From 097faedbf5d0f8181543f60d6f9e5ff3f7425c55 Mon Sep 17 00:00:00 2001
From: Cursor Agent <cursoragent@cursor.com>
Date: Fri, 14 Aug 2026 06:04:06 +0000
Subject: [PATCH 1/6] Remove dead pre-2021 host version checks

After dropping Revit 2013-2020, HOST_APP.is_newer_than checks against
those versions (and equivalent is_older_than / version comparisons)
are always true or always false. Keep the supported-API path and drop
the legacy branches, including the unused MatchConfigWindowLegacy UI.

Co-authored-by: Jean-Marc Couffin <jmcouffin@users.noreply.github.com>
---
 dev/pyRevitWPFForms/pyRevitWPFForms.csproj    |   1 -
 .../pyRevitTags.extension/lib/tagsmgr.py      |  15 +--
 .../Manage Tags.pushbutton/script.py          |  18 ---
 .../ColorSplasher.pushbutton/script.py        |  23 +---
 .../Print Sheets.pushbutton/script.py         |   4 +-
 .../Copy Views.pushbutton/script.py           |  14 +-
 .../Find Views By Filter.pushbutton/script.py |  55 +++-----
 .../script.py                                 |  11 +-
 ...owLegacy.ResourceDictionary.chinese_s.xaml |  37 ------
 ...WindowLegacy.ResourceDictionary.de_de.xaml |  37 ------
 ...WindowLegacy.ResourceDictionary.en_us.xaml |  37 ------
 ...WindowLegacy.ResourceDictionary.es_es.xaml |  37 ------
 ...WindowLegacy.ResourceDictionary.fr_fr.xaml |  37 ------
 ...figWindowLegacy.ResourceDictionary.ko.xaml |  37 ------
 ...WindowLegacy.ResourceDictionary.pt_br.xaml |  37 ------
 ...figWindowLegacy.ResourceDictionary.ru.xaml |  37 ------
 .../MatchConfigWindowLegacy.xaml              |  48 -------
 .../Match.pushbutton/config.py                |  66 ++++-----
 .../Match.pushbutton/script.py                | 125 +++++++-----------
 .../Make Pattern.pushbutton/patmaker.py       |   7 +-
 .../Make Pattern.pushbutton/script.py         |  22 +--
 .../ColorizeGroupTypes.pushbutton/script.py   |  30 ++---
 .../Override VG.pushbutton/script.py          |  17 +--
 .../Wipe Data Schema.pushbutton/script.py     |  10 +-
 .../Reload Links.pushbutton/script.py         |  18 +--
 pyrevitlib/pyrevit/__init__.py                |  24 +---
 pyrevitlib/pyrevit/coreutils/applocales.py    |  14 +-
 pyrevitlib/pyrevit/coreutils/ribbon.py        |  30 ++---
 pyrevitlib/pyrevit/labs.py                    |   5 -
 pyrevitlib/pyrevit/loader/sessioninfo.py      |   8 +-
 pyrevitlib/pyrevit/revit/db/__init__.py       |   1 -
 pyrevitlib/pyrevit/revit/db/create.py         |  24 +---
 pyrevitlib/pyrevit/revit/db/query.py          |  49 ++-----
 pyrevitlib/pyrevit/revit/db/update.py         |  27 +---
 pyrevitlib/pyrevit/revit/tabs.py              |  51 ++++---
 pyrevitlib/pyrevit/runtime/__init__.py        |   3 +-
 release/pyrevit.aip                           |   1 -
 37 files changed, 218 insertions(+), 799 deletions(-)
 delete mode 100644 extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.chinese_s.xaml
 delete mode 100644 extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.de_de.xaml
 delete mode 100644 extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.en_us.xaml
 delete mode 100644 extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.es_es.xaml
 delete mode 100644 extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.fr_fr.xaml
 delete mode 100644 extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.ko.xaml
 delete mode 100644 extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.pt_br.xaml
 delete mode 100644 extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.ru.xaml
 delete mode 100644 extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.xaml

diff --git a/dev/pyRevitWPFForms/pyRevitWPFForms.csproj b/dev/pyRevitWPFForms/pyRevitWPFForms.csproj
index dfb5546527..dbea656da2 100644
--- a/dev/pyRevitWPFForms/pyRevitWPFForms.csproj
+++ b/dev/pyRevitWPFForms/pyRevitWPFForms.csproj
@@ -43,7 +43,6 @@
     <Page Include="$(PyRevitExtDir)\pyRevitTools.extension\pyRevit.tab\Drawing Set.panel\Sheets.pulldown\Batch Sheet Maker.pushbutton\BatchSheetMakerWindow.xaml" Link="Tools\BatchSheetMakerWindow.xaml" />
     <Page Include="$(PyRevitExtDir)\pyRevitTools.extension\pyRevit.tab\Drawing Set.panel\Sheets.pulldown\ReOrder Sheets.pushbutton\ReOrderWindow.xaml" Link="Tools\ReOrderWindow.xaml" />
     <Page Include="$(PyRevitExtDir)\pyRevitTools.extension\pyRevit.tab\Modify.panel\edit1.stack\Match.splitpushbutton\Match.pushbutton\MatchConfigWindow.xaml" Link="Tools\MatchConfigWindow.xaml" />
-    <Page Include="$(PyRevitExtDir)\pyRevitTools.extension\pyRevit.tab\Modify.panel\edit1.stack\Match.splitpushbutton\Match.pushbutton\MatchConfigWindowLegacy.xaml" Link="Tools\MatchConfigWindowLegacy.xaml" />
     <Page Include="$(PyRevitExtDir)\pyRevitTools.extension\pyRevit.tab\Modify.panel\edit1.stack\Patterns.splitpushbutton\Make Pattern.pushbutton\MakePatternWindow.xaml" Link="Tools\MakePatternWindow.xaml" />
     <Page Include="$(PyRevitExtDir)\pyRevitTools.extension\pyRevit.tab\Modify.panel\edit2.stack\ReValue.pushbutton\ReValueWindow.xaml" Link="Tools\ReValueWindow.xaml" />
     <Page Include="$(PyRevitExtDir)\pyRevitTools.extension\pyRevit.tab\Modify.panel\edit3.stack\Edit.pulldown\Convert Line Styles.pushbutton\ConvertLineStyles.xaml" Link="Tools\ConvertLineStyles.xaml" />
diff --git a/extensions/pyRevitTags.extension/lib/tagsmgr.py b/extensions/pyRevitTags.extension/lib/tagsmgr.py
index 779cf5df99..8a6abf2f28 100644
--- a/extensions/pyRevitTags.extension/lib/tagsmgr.py
+++ b/extensions/pyRevitTags.extension/lib/tagsmgr.py
@@ -2,7 +2,6 @@
 #pylint: disable=E0401,C0111,W0603,C0103
 from collections import namedtuple
 
-from pyrevit import HOST_APP
 from pyrevit import PyRevitException
 from pyrevit.coreutils import pyutils
 from pyrevit.coreutils import logger
@@ -35,18 +34,12 @@
     DB.BuiltInCategory.OST_DSR_CenterlineTickMarkStyleId,
     DB.BuiltInCategory.OST_DSR_CenterlinePatternCatId,
     DB.BuiltInCategory.OST_CenterLines,
-    DB.BuiltInCategory.OST_StairsSketchLandingCenterLines
+    DB.BuiltInCategory.OST_StairsSketchLandingCenterLines,
+    DB.BuiltInCategory.OST_FabricationContainmentCenterLine,
+    DB.BuiltInCategory.OST_FabricationPipeworkCenterLine,
+    DB.BuiltInCategory.OST_FabricationDuctworkCenterLine,
     ]
 
-if HOST_APP.is_newer_than(2016):
-    SCOPE_SKIP_CATEGORIES.extend(
-        [
-            DB.BuiltInCategory.OST_FabricationContainmentCenterLine,
-            DB.BuiltInCategory.OST_FabricationPipeworkCenterLine,
-            DB.BuiltInCategory.OST_FabricationDuctworkCenterLine,
-        ]
-    )
-
 
 ApplyTagsConfig = namedtuple('ApplyTagsConfig', ['append', 'circuits'])
 """namedtuple for configuring the behaviour of :func:`apply_tags`
diff --git a/extensions/pyRevitTags.extension/pyRevit.tab/Packages & Tags.panel/Manage Tags.pushbutton/script.py b/extensions/pyRevitTags.extension/pyRevit.tab/Packages & Tags.panel/Manage Tags.pushbutton/script.py
index 305a20fba7..203591da6c 100644
--- a/extensions/pyRevitTags.extension/pyRevit.tab/Packages & Tags.panel/Manage Tags.pushbutton/script.py	
+++ b/extensions/pyRevitTags.extension/pyRevit.tab/Packages & Tags.panel/Manage Tags.pushbutton/script.py	
@@ -237,24 +237,6 @@ def make_schedule(self, sender, args):
                                 'selected tag.'
                                 .format(catname=tag_cat.Name))
                     return
-                    if HOST_APP.is_newer_than(2020, or_equal=True):
-                        sch = \
-                            forms.SelectFromList.show(
-                                cat_schedules,
-                                name_attr='Name',
-                                title='Select Schedule',
-                                button_name='Select Schedule',
-                                width=400, height=300
-                                )
-                    else:
-                        sch = \
-                            forms.SelectFromList.show(
-                                cat_schedules,
-                                name_attr='ViewName',
-                                title='Select Schedule',
-                                button_name='Select Schedule',
-                                width=400, height=300
-                                )
 
                 tag_sched = \
                     forms.SelectFromList.show(
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Analysis.panel/ColorSplasher.pushbutton/script.py b/extensions/pyRevitTools.extension/pyRevit.tab/Analysis.panel/ColorSplasher.pushbutton/script.py
index 3c7bfd271e..eb6c5d58cb 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Analysis.panel/ColorSplasher.pushbutton/script.py
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Analysis.panel/ColorSplasher.pushbutton/script.py
@@ -946,18 +946,10 @@ def _setup_ui(self):
             "apply_foreground_pattern_color", True
         )
 
-        if HOST_APP.is_newer_than(2019, or_equal=True):
-            self._chk_background_pattern.IsChecked = self._config.get_option(
-                "apply_background_pattern_color", False
-            )
-            self._chk_background_pattern.IsEnabled = True
-        else:
-            self._chk_background_pattern.IsChecked = False
-            self._chk_background_pattern.IsEnabled = False
-            bg_pattern_text = self.get_locale_string(
-                "ColorSplasher.Checkboxes.ApplyBackgroundPattern.RequiresRevit2019"
-            )
-            self._chk_background_pattern.Content = bg_pattern_text
+        self._chk_background_pattern.IsChecked = self._config.get_option(
+            "apply_background_pattern_color", False
+        )
+        self._chk_background_pattern.IsEnabled = True
 
         self.list_box2.SelectionChanged += self.list_selected_index_changed
         self.list_box2.MouseDown += self.list_box2_mouse_down
@@ -1029,10 +1021,9 @@ def checkbox_changed(self, sender, e):
         self._config.set_option(
             "apply_foreground_pattern_color", self._chk_foreground_pattern.IsChecked
         )
-        if HOST_APP.is_newer_than(2019, or_equal=True):
-            self._config.set_option(
-                "apply_background_pattern_color", self._chk_background_pattern.IsChecked
-            )
+        self._config.set_option(
+            "apply_background_pattern_color", self._chk_background_pattern.IsChecked
+        )
         pyrevit_script.save_config()
 
     def button_click_set_colors(self, sender, e):
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/Print Sheets.pushbutton/script.py b/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/Print Sheets.pushbutton/script.py
index f6a7a0a1f1..f02dfdfd74 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/Print Sheets.pushbutton/script.py	
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/Print Sheets.pushbutton/script.py	
@@ -50,9 +50,7 @@
 INDEX_FORMAT = '{{:0{digits}}}'
 
 
-EXPORT_ENCODING = 'utf_16_le'
-if HOST_APP.is_newer_than(2020):
-    EXPORT_ENCODING = 'utf_8'
+EXPORT_ENCODING = 'utf_8'
 
 IS_REVIT_2022_OR_NEWER = HOST_APP.is_newer_than(2021)
 
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/Sheets.pulldown/Copy Views.pushbutton/script.py b/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/Sheets.pulldown/Copy Views.pushbutton/script.py
index fb31b85210..ccc6a47bf9 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/Sheets.pulldown/Copy Views.pushbutton/script.py	
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/Sheets.pulldown/Copy Views.pushbutton/script.py	
@@ -1,4 +1,4 @@
-from pyrevit import revit, DB, UI, HOST_APP
+from pyrevit import revit, DB
 from pyrevit import forms
 from pyrevit import script
 
@@ -40,14 +40,10 @@ def update_if_placed(vport, exst_vps):
 
 # get a list of viewports to be copied, updated
 if selected_sheets and len(selected_sheets) > 0:
-    if int(HOST_APP.version) > 2014:
-        cursheet = revit.uidoc.ActiveGraphicalView
-        for v in selected_sheets:
-            if cursheet.Id == v.Id:
-                selected_sheets.remove(v)
-    else:
-        cursheet = selected_sheets[0]
-        selected_sheets.remove(cursheet)
+    cursheet = revit.uidoc.ActiveGraphicalView
+    for v in selected_sheets:
+        if cursheet.Id == v.Id:
+            selected_sheets.remove(v)
 
     revit.uidoc.ActiveView = cursheet
     selected_vps = revit.pick_elements()
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/views.stack/Views.pulldown/Find Views By Filter.pushbutton/script.py b/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/views.stack/Views.pulldown/Find Views By Filter.pushbutton/script.py
index 7dc645bb31..64bceca73f 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/views.stack/Views.pulldown/Find Views By Filter.pushbutton/script.py	
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/views.stack/Views.pulldown/Find Views By Filter.pushbutton/script.py	
@@ -1,6 +1,5 @@
 """Lists views based on a search option."""
 
-from pyrevit import HOST_APP
 from pyrevit import revit, DB
 from pyrevit import script
 from pyrevit import forms
@@ -22,41 +21,27 @@ def elementid_has_value(p):
 def find_views_with_underlay(invert=False):
     for v in views:
         try:
-            if HOST_APP.is_newer_than(2016, or_equal=True):
-                base_underlay_param = \
-                    v.Parameter[DB.BuiltInParameter.VIEW_UNDERLAY_BOTTOM_ID]
-                top_underlay_param = \
-                    v.Parameter[DB.BuiltInParameter.VIEW_UNDERLAY_TOP_ID]
-                if (base_underlay_param \
-                        and top_underlay_param \
-                        and elementid_has_value(base_underlay_param) \
-                        and elementid_has_value(top_underlay_param)
-                        ) != invert:
-                    print('TYPE: {1}\n'
-                          'ID: {2}\n'
-                          'TEMPLATE: {3}\n'
-                          'UNDERLAY (BASE): {4}\n'
-                          'UNDERLAY (TOP): {5}\n'
-                          '{0}\n\n'
-                          .format(revit.query.get_name(v),
-                                  str(v.ViewType).ljust(20),
-                                  output.linkify(v.Id),
-                                  str(v.IsTemplate).ljust(10),
-                                  base_underlay_param.AsValueString().ljust(25),
-                                  top_underlay_param.AsValueString().ljust(25)))
-            else:
-                underlayp = v.Parameter[DB.BuiltInParameter.VIEW_UNDERLAY_ID]
-                if (underlayp and elementid_has_value(underlayp)
+            base_underlay_param = \
+                v.Parameter[DB.BuiltInParameter.VIEW_UNDERLAY_BOTTOM_ID]
+            top_underlay_param = \
+                v.Parameter[DB.BuiltInParameter.VIEW_UNDERLAY_TOP_ID]
+            if (base_underlay_param \
+                    and top_underlay_param \
+                    and elementid_has_value(base_underlay_param) \
+                    and elementid_has_value(top_underlay_param)
                     ) != invert:
-                    print('TYPE: {1}\n'
-                          'ID: {2}\n'
-                          'TEMPLATE: {3}\n'
-                          'UNDERLAY: {4}\n'
-                          '{0}\n\n'.format(revit.query.get_name(v),
-                                           str(v.ViewType).ljust(20),
-                                           output.linkify(v.Id),
-                                           str(v.IsTemplate).ljust(10),
-                                           underlayp.AsValueString().ljust(25)))
+                print('TYPE: {1}\n'
+                      'ID: {2}\n'
+                      'TEMPLATE: {3}\n'
+                      'UNDERLAY (BASE): {4}\n'
+                      'UNDERLAY (TOP): {5}\n'
+                      '{0}\n\n'
+                      .format(revit.query.get_name(v),
+                              str(v.ViewType).ljust(20),
+                              output.linkify(v.Id),
+                              str(v.IsTemplate).ljust(10),
+                              base_underlay_param.AsValueString().ljust(25),
+                              top_underlay_param.AsValueString().ljust(25)))
             print("\n\n")
         except Exception:
             continue
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/views.stack/Views.pulldown/Remove Underlay From Selected Views.pushbutton/script.py b/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/views.stack/Views.pulldown/Remove Underlay From Selected Views.pushbutton/script.py
index f28eee6ccf..133a49b95b 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/views.stack/Views.pulldown/Remove Underlay From Selected Views.pushbutton/script.py	
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/views.stack/Views.pulldown/Remove Underlay From Selected Views.pushbutton/script.py	
@@ -4,7 +4,6 @@
 # http://dp-stuff.org/revit-view-underlay-property-python-problem/
 
 
-from pyrevit import HOST_APP
 from pyrevit import revit, DB
 from pyrevit import forms
 from pyrevit.compat import get_elementid_value_func
@@ -20,12 +19,4 @@
             if get_elementid_value(view.Category.Id) == \
                     int(DB.BuiltInCategory.OST_Views) \
                     and (view.CanBePrinted):
-                if HOST_APP.is_newer_than(2016):
-                    view.SetUnderlayRange(DB.ElementId.InvalidElementId, DB.ElementId.InvalidElementId)
-                else:
-                    p = view.get_Parameter(
-                        DB.BuiltInParameter.VIEW_UNDERLAY_ID
-                        )
-
-                    if p is not None:
-                        p.Set(DB.ElementId.InvalidElementId)
+                view.SetUnderlayRange(DB.ElementId.InvalidElementId, DB.ElementId.InvalidElementId)
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.chinese_s.xaml b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.chinese_s.xaml
deleted file mode 100644
index 30c4b5362a..0000000000
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.chinese_s.xaml
+++ /dev/null
@@ -1,37 +0,0 @@
-<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-                    xmlns:system="clr-namespace:System;assembly=mscorlib">
-    <system:String x:Key="Title">选择要匹配的选项：</system:String>
-    
-    <system:String x:Key="ElementGraphicsOverrides">图元图形替代：</system:String>
-    <system:String x:Key="Halftone">半色调</system:String>
-    <system:String x:Key="Transparency">透明度</system:String>
-    
-    <system:String x:Key="ProjectionOptions">投影选项：</system:String>
-    <system:String x:Key="ProjectionLineColor">投影线颜色</system:String>
-    <system:String x:Key="ProjectionLinePattern">投影线型图案</system:String>
-    <system:String x:Key="ProjectionLineWeight">投影线宽</system:String>
-    <system:String x:Key="ProjectionFillColor">投影填充颜色</system:String>
-    <system:String x:Key="ProjectionFillPattern">投影填充图案</system:String>
-    <system:String x:Key="ProjectionFillPatternVisibility">投影填充图案可见性</system:String>
-    
-    <system:String x:Key="CutOptions">截面选项：</system:String>
-    <system:String x:Key="CutLineColor">截面线颜色</system:String>
-    <system:String x:Key="CutLinePattern">截面线型图案</system:String>
-    <system:String x:Key="CutLineWeight">截面线宽</system:String>
-    <system:String x:Key="CutFillColor">截面填充颜色</system:String>
-    <system:String x:Key="CutFillPattern">截面填充图案</system:String>
-    <system:String x:Key="CutFillPatternVisibility">截面填充图案可见性</system:String>
-    
-    <system:String x:Key="DimensionOverrides">尺寸替代：</system:String>
-    <system:String x:Key="ReplacedValue">替换值</system:String>
-    <system:String x:Key="TextPosition">文字位置</system:String>
-    <system:String x:Key="AboveValue">上方值</system:String>
-    <system:String x:Key="BelowValue">下方值</system:String>
-    <system:String x:Key="PrefixValue">前缀值</system:String>
-    <system:String x:Key="PostfixValue">后缀值</system:String>
-    
-    <system:String x:Key="CheckAll">全选</system:String>
-    <system:String x:Key="CheckNone">全不选</system:String>
-    <system:String x:Key="SaveOptions">保存选项</system:String>
-</ResourceDictionary>
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.de_de.xaml b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.de_de.xaml
deleted file mode 100644
index 0cac7f655b..0000000000
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.de_de.xaml
+++ /dev/null
@@ -1,37 +0,0 @@
-<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-                    xmlns:system="clr-namespace:System;assembly=mscorlib">
-    <system:String x:Key="Title">Zu Abgleichende Optionen Auswählen:</system:String>
-    
-    <system:String x:Key="ElementGraphicsOverrides">Elementgrafik-Überschreibungen:</system:String>
-    <system:String x:Key="Halftone">Halbton</system:String>
-    <system:String x:Key="Transparency">Transparenz</system:String>
-    
-    <system:String x:Key="ProjectionOptions">Projektions-Optionen:</system:String>
-    <system:String x:Key="ProjectionLineColor">Projektions-Linienfarbe</system:String>
-    <system:String x:Key="ProjectionLinePattern">Projektions-Linienmuster</system:String>
-    <system:String x:Key="ProjectionLineWeight">Projektions-Linienstärke</system:String>
-    <system:String x:Key="ProjectionFillColor">Projektions-Füllfarbe</system:String>
-    <system:String x:Key="ProjectionFillPattern">Projektions-Füllmuster</system:String>
-    <system:String x:Key="ProjectionFillPatternVisibility">Projektions-Füllmuster-Sichtbarkeit</system:String>
-    
-    <system:String x:Key="CutOptions">Schnitt-Optionen:</system:String>
-    <system:String x:Key="CutLineColor">Schnitt-Linienfarbe</system:String>
-    <system:String x:Key="CutLinePattern">Schnitt-Linienmuster</system:String>
-    <system:String x:Key="CutLineWeight">Schnitt-Linienstärke</system:String>
-    <system:String x:Key="CutFillColor">Schnitt-Füllfarbe</system:String>
-    <system:String x:Key="CutFillPattern">Schnitt-Füllmuster</system:String>
-    <system:String x:Key="CutFillPatternVisibility">Schnitt-Füllmuster-Sichtbarkeit</system:String>
-    
-    <system:String x:Key="DimensionOverrides">Bemaßungsüberschreibungen:</system:String>
-    <system:String x:Key="ReplacedValue">Ersetzter Wert</system:String>
-    <system:String x:Key="TextPosition">Textposition</system:String>
-    <system:String x:Key="AboveValue">Wert Oben</system:String>
-    <system:String x:Key="BelowValue">Wert Unten</system:String>
-    <system:String x:Key="PrefixValue">Präfix-Wert</system:String>
-    <system:String x:Key="PostfixValue">Postfix-Wert</system:String>
-    
-    <system:String x:Key="CheckAll">Alle Auswählen</system:String>
-    <system:String x:Key="CheckNone">Alle Abwählen</system:String>
-    <system:String x:Key="SaveOptions">Optionen Speichern</system:String>
-</ResourceDictionary>
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.en_us.xaml b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.en_us.xaml
deleted file mode 100644
index aa727e0198..0000000000
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.en_us.xaml
+++ /dev/null
@@ -1,37 +0,0 @@
-<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-                    xmlns:system="clr-namespace:System;assembly=mscorlib">
-    <system:String x:Key="Title">Select Options to Match:</system:String>
-    
-    <system:String x:Key="ElementGraphicsOverrides">Element Graphics Overrides:</system:String>
-    <system:String x:Key="Halftone">Halftone</system:String>
-    <system:String x:Key="Transparency">Transparency</system:String>
-    
-    <system:String x:Key="ProjectionOptions">Projection Options:</system:String>
-    <system:String x:Key="ProjectionLineColor">Projection Line Color</system:String>
-    <system:String x:Key="ProjectionLinePattern">Projection Line Pattern</system:String>
-    <system:String x:Key="ProjectionLineWeight">Projection Line Weight</system:String>
-    <system:String x:Key="ProjectionFillColor">Projection Fill Color</system:String>
-    <system:String x:Key="ProjectionFillPattern">Projection Fill Pattern</system:String>
-    <system:String x:Key="ProjectionFillPatternVisibility">Projection Fill Pattern Visibility</system:String>
-    
-    <system:String x:Key="CutOptions">Cut Options:</system:String>
-    <system:String x:Key="CutLineColor">Cut Line Color</system:String>
-    <system:String x:Key="CutLinePattern">Cut Line Pattern</system:String>
-    <system:String x:Key="CutLineWeight">Cut Line Weight</system:String>
-    <system:String x:Key="CutFillColor">Cut Fill Color</system:String>
-    <system:String x:Key="CutFillPattern">Cut Fill Pattern</system:String>
-    <system:String x:Key="CutFillPatternVisibility">Cut Fill Pattern Visibility</system:String>
-    
-    <system:String x:Key="DimensionOverrides">Dimension Overrides:</system:String>
-    <system:String x:Key="ReplacedValue">Replaced Value</system:String>
-    <system:String x:Key="TextPosition">Text Position</system:String>
-    <system:String x:Key="AboveValue">Above Value</system:String>
-    <system:String x:Key="BelowValue">Below Value</system:String>
-    <system:String x:Key="PrefixValue">Prefix Value</system:String>
-    <system:String x:Key="PostfixValue">Postfix Value</system:String>
-    
-    <system:String x:Key="CheckAll">Check All</system:String>
-    <system:String x:Key="CheckNone">Check None</system:String>
-    <system:String x:Key="SaveOptions">Save Options</system:String>
-</ResourceDictionary>
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.es_es.xaml b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.es_es.xaml
deleted file mode 100644
index f0226301bc..0000000000
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.es_es.xaml
+++ /dev/null
@@ -1,37 +0,0 @@
-<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-                    xmlns:system="clr-namespace:System;assembly=mscorlib">
-    <system:String x:Key="Title">Seleccionar Opciones para Coincidir:</system:String>
-    
-    <system:String x:Key="ElementGraphicsOverrides">Anulaciones de Gráficos de Elemento:</system:String>
-    <system:String x:Key="Halftone">Medio Tono</system:String>
-    <system:String x:Key="Transparency">Transparencia</system:String>
-    
-    <system:String x:Key="ProjectionOptions">Opciones de Proyección:</system:String>
-    <system:String x:Key="ProjectionLineColor">Color de Línea de Proyección</system:String>
-    <system:String x:Key="ProjectionLinePattern">Patrón de Línea de Proyección</system:String>
-    <system:String x:Key="ProjectionLineWeight">Grosor de Línea de Proyección</system:String>
-    <system:String x:Key="ProjectionFillColor">Color de Relleno de Proyección</system:String>
-    <system:String x:Key="ProjectionFillPattern">Patrón de Relleno de Proyección</system:String>
-    <system:String x:Key="ProjectionFillPatternVisibility">Visibilidad del Patrón de Relleno de Proyección</system:String>
-    
-    <system:String x:Key="CutOptions">Opciones de Corte:</system:String>
-    <system:String x:Key="CutLineColor">Color de Línea de Corte</system:String>
-    <system:String x:Key="CutLinePattern">Patrón de Línea de Corte</system:String>
-    <system:String x:Key="CutLineWeight">Grosor de Línea de Corte</system:String>
-    <system:String x:Key="CutFillColor">Color de Relleno de Corte</system:String>
-    <system:String x:Key="CutFillPattern">Patrón de Relleno de Corte</system:String>
-    <system:String x:Key="CutFillPatternVisibility">Visibilidad del Patrón de Relleno de Corte</system:String>
-    
-    <system:String x:Key="DimensionOverrides">Anulaciones de Dimensión:</system:String>
-    <system:String x:Key="ReplacedValue">Valor Reemplazado</system:String>
-    <system:String x:Key="TextPosition">Posición del Texto</system:String>
-    <system:String x:Key="AboveValue">Valor Superior</system:String>
-    <system:String x:Key="BelowValue">Valor Inferior</system:String>
-    <system:String x:Key="PrefixValue">Valor de Prefijo</system:String>
-    <system:String x:Key="PostfixValue">Valor de Sufijo</system:String>
-    
-    <system:String x:Key="CheckAll">Marcar Todo</system:String>
-    <system:String x:Key="CheckNone">Desmarcar Todo</system:String>
-    <system:String x:Key="SaveOptions">Guardar Opciones</system:String>
-</ResourceDictionary>
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.fr_fr.xaml b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.fr_fr.xaml
deleted file mode 100644
index 103ce505e0..0000000000
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.fr_fr.xaml
+++ /dev/null
@@ -1,37 +0,0 @@
-<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-                    xmlns:system="clr-namespace:System;assembly=mscorlib">
-    <system:String x:Key="Title">Sélectionner les Options à Correspondre :</system:String>
-    
-    <system:String x:Key="ElementGraphicsOverrides">Remplacements Graphiques d'Élément :</system:String>
-    <system:String x:Key="Halftone">Demi-teinte</system:String>
-    <system:String x:Key="Transparency">Transparence</system:String>
-    
-    <system:String x:Key="ProjectionOptions">Options de Projection :</system:String>
-    <system:String x:Key="ProjectionLineColor">Couleur de Ligne de Projection</system:String>
-    <system:String x:Key="ProjectionLinePattern">Motif de Ligne de Projection</system:String>
-    <system:String x:Key="ProjectionLineWeight">Épaisseur de Ligne de Projection</system:String>
-    <system:String x:Key="ProjectionFillColor">Couleur de Remplissage de Projection</system:String>
-    <system:String x:Key="ProjectionFillPattern">Motif de Remplissage de Projection</system:String>
-    <system:String x:Key="ProjectionFillPatternVisibility">Visibilité du Motif de Remplissage de Projection</system:String>
-    
-    <system:String x:Key="CutOptions">Options de Coupe :</system:String>
-    <system:String x:Key="CutLineColor">Couleur de Ligne de Coupe</system:String>
-    <system:String x:Key="CutLinePattern">Motif de Ligne de Coupe</system:String>
-    <system:String x:Key="CutLineWeight">Épaisseur de Ligne de Coupe</system:String>
-    <system:String x:Key="CutFillColor">Couleur de Remplissage de Coupe</system:String>
-    <system:String x:Key="CutFillPattern">Motif de Remplissage de Coupe</system:String>
-    <system:String x:Key="CutFillPatternVisibility">Visibilité du Motif de Remplissage de Coupe</system:String>
-    
-    <system:String x:Key="DimensionOverrides">Remplacements de Cote :</system:String>
-    <system:String x:Key="ReplacedValue">Valeur Remplacée</system:String>
-    <system:String x:Key="TextPosition">Position du Texte</system:String>
-    <system:String x:Key="AboveValue">Valeur au-dessus</system:String>
-    <system:String x:Key="BelowValue">Valeur en-dessous</system:String>
-    <system:String x:Key="PrefixValue">Valeur de Préfixe</system:String>
-    <system:String x:Key="PostfixValue">Valeur de Postfixe</system:String>
-    
-    <system:String x:Key="CheckAll">Tout Cocher</system:String>
-    <system:String x:Key="CheckNone">Tout Décocher</system:String>
-    <system:String x:Key="SaveOptions">Enregistrer les Options</system:String>
-</ResourceDictionary>
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.ko.xaml b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.ko.xaml
deleted file mode 100644
index 9aee75a8de..0000000000
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.ko.xaml
+++ /dev/null
@@ -1,37 +0,0 @@
-<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-                    xmlns:system="clr-namespace:System;assembly=mscorlib">
-    <system:String x:Key="Title">일치할 옵션 선택:</system:String>
-
-    <system:String x:Key="ElementGraphicsOverrides">요소 그래픽 재정의:</system:String>
-    <system:String x:Key="Halftone">하프톤</system:String>
-    <system:String x:Key="Transparency">투명도</system:String>
-
-    <system:String x:Key="ProjectionOptions">투영 옵션:</system:String>
-    <system:String x:Key="ProjectionLineColor">투영 선 색상</system:String>
-    <system:String x:Key="ProjectionLinePattern">투영 선 패턴</system:String>
-    <system:String x:Key="ProjectionLineWeight">투영 선 두께</system:String>
-    <system:String x:Key="ProjectionFillColor">투영 채우기 색상</system:String>
-    <system:String x:Key="ProjectionFillPattern">투영 채우기 패턴</system:String>
-    <system:String x:Key="ProjectionFillPatternVisibility">투영 채우기 패턴 가시성</system:String>
-
-    <system:String x:Key="CutOptions">절단 옵션:</system:String>
-    <system:String x:Key="CutLineColor">절단 선 색상</system:String>
-    <system:String x:Key="CutLinePattern">절단 선 패턴</system:String>
-    <system:String x:Key="CutLineWeight">절단 선 두께</system:String>
-    <system:String x:Key="CutFillColor">절단 채우기 색상</system:String>
-    <system:String x:Key="CutFillPattern">절단 채우기 패턴</system:String>
-    <system:String x:Key="CutFillPatternVisibility">절단 채우기 패턴 가시성</system:String>
-
-    <system:String x:Key="DimensionOverrides">치수 재정의:</system:String>
-    <system:String x:Key="ReplacedValue">대체 값</system:String>
-    <system:String x:Key="TextPosition">텍스트 위치</system:String>
-    <system:String x:Key="AboveValue">위 값</system:String>
-    <system:String x:Key="BelowValue">아래 값</system:String>
-    <system:String x:Key="PrefixValue">접두사 값</system:String>
-    <system:String x:Key="PostfixValue">접미사 값</system:String>
-
-    <system:String x:Key="CheckAll">모두 선택</system:String>
-    <system:String x:Key="CheckNone">모두 해제</system:String>
-    <system:String x:Key="SaveOptions">옵션 저장</system:String>
-</ResourceDictionary>
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.pt_br.xaml b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.pt_br.xaml
deleted file mode 100644
index 64d7125bef..0000000000
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.pt_br.xaml
+++ /dev/null
@@ -1,37 +0,0 @@
-<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-                    xmlns:system="clr-namespace:System;assembly=mscorlib">
-    <system:String x:Key="Title">Selecione as opções a igualar:</system:String>
-    
-    <system:String x:Key="ElementGraphicsOverrides">Sobreposições de gráficos de elementos:</system:String>
-    <system:String x:Key="Halftone">Meio-tom</system:String>
-    <system:String x:Key="Transparency">Transparência</system:String>
-    
-    <system:String x:Key="ProjectionOptions">Opções de projeção:</system:String>
-    <system:String x:Key="ProjectionLineColor">Cor da linha de projeção</system:String>
-    <system:String x:Key="ProjectionLinePattern">Padrão da linha de projeção</system:String>
-    <system:String x:Key="ProjectionLineWeight">Espessura da linha de projeção</system:String>
-    <system:String x:Key="ProjectionFillColor">Cor de preenchimento da projeção</system:String>
-    <system:String x:Key="ProjectionFillPattern">Padrão de preenchimento da projeção</system:String>
-    <system:String x:Key="ProjectionFillPatternVisibility">Visibilidade do padrão de projeção</system:String>
-    
-    <system:String x:Key="CutOptions">Opções de corte:</system:String>
-    <system:String x:Key="CutLineColor">Cor da linha de corte</system:String>
-    <system:String x:Key="CutLinePattern">Padrão da linha de corte</system:String>
-    <system:String x:Key="CutLineWeight">Espessura da linha de corte</system:String>
-    <system:String x:Key="CutFillColor">Cor de preenchimento de corte</system:String>
-    <system:String x:Key="CutFillPattern">Padrão de preenchimento de corte</system:String>
-    <system:String x:Key="CutFillPatternVisibility">Visibilidade do padrão de corte</system:String>
-    
-    <system:String x:Key="DimensionOverrides">Sobreposições de cota:</system:String>
-    <system:String x:Key="ReplacedValue">Valor substituído</system:String>
-    <system:String x:Key="TextPosition">Posição do texto</system:String>
-    <system:String x:Key="AboveValue">Valor acima</system:String>
-    <system:String x:Key="BelowValue">Valor abaixo</system:String>
-    <system:String x:Key="PrefixValue">Valor de prefixo</system:String>
-    <system:String x:Key="PostfixValue">Valor de sufixo</system:String>
-    
-    <system:String x:Key="CheckAll">Marcar todos</system:String>
-    <system:String x:Key="CheckNone">Desmarcar todos</system:String>
-    <system:String x:Key="SaveOptions">Salvar opções</system:String>
-</ResourceDictionary>
\ No newline at end of file
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.ru.xaml b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.ru.xaml
deleted file mode 100644
index 72cff4e998..0000000000
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.ResourceDictionary.ru.xaml
+++ /dev/null
@@ -1,37 +0,0 @@
-<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-                    xmlns:system="clr-namespace:System;assembly=mscorlib">
-    <system:String x:Key="Title">Выберите параметры для сопоставления:</system:String>
-    
-    <system:String x:Key="ElementGraphicsOverrides">Переопределения графики элемента:</system:String>
-    <system:String x:Key="Halftone">Полутон</system:String>
-    <system:String x:Key="Transparency">Прозрачность</system:String>
-    
-    <system:String x:Key="ProjectionOptions">Параметры проекции:</system:String>
-    <system:String x:Key="ProjectionLineColor">Цвет линии проекции</system:String>
-    <system:String x:Key="ProjectionLinePattern">Тип линии проекции</system:String>
-    <system:String x:Key="ProjectionLineWeight">Толщина линии проекции</system:String>
-    <system:String x:Key="ProjectionFillColor">Цвет заливки проекции</system:String>
-    <system:String x:Key="ProjectionFillPattern">Узор заливки проекции</system:String>
-    <system:String x:Key="ProjectionFillPatternVisibility">Видимость узора заливки проекции</system:String>
-    
-    <system:String x:Key="CutOptions">Параметры разреза:</system:String>
-    <system:String x:Key="CutLineColor">Цвет линии разреза</system:String>
-    <system:String x:Key="CutLinePattern">Тип линии разреза</system:String>
-    <system:String x:Key="CutLineWeight">Толщина линии разреза</system:String>
-    <system:String x:Key="CutFillColor">Цвет заливки разреза</system:String>
-    <system:String x:Key="CutFillPattern">Узор заливки разреза</system:String>
-    <system:String x:Key="CutFillPatternVisibility">Видимость узора заливки разреза</system:String>
-    
-    <system:String x:Key="DimensionOverrides">Переопределения размеров:</system:String>
-    <system:String x:Key="ReplacedValue">Замененное значение</system:String>
-    <system:String x:Key="TextPosition">Позиция текста</system:String>
-    <system:String x:Key="AboveValue">Значение сверху</system:String>
-    <system:String x:Key="BelowValue">Значение снизу</system:String>
-    <system:String x:Key="PrefixValue">Значение префикса</system:String>
-    <system:String x:Key="PostfixValue">Значение постфикса</system:String>
-    
-    <system:String x:Key="CheckAll">Выбрать все</system:String>
-    <system:String x:Key="CheckNone">Снять все</system:String>
-    <system:String x:Key="SaveOptions">Сохранить параметры</system:String>
-</ResourceDictionary>
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.xaml b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.xaml
deleted file mode 100644
index 9eaa4216c4..0000000000
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/MatchConfigWindowLegacy.xaml
+++ /dev/null
@@ -1,48 +0,0 @@
-<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-        Title="{DynamicResource Title}" Height="530" Width="500" ShowInTaskbar="False" ResizeMode="NoResize"
-        WindowStartupLocation="CenterScreen" ScrollViewer.VerticalScrollBarVisibility="Disabled" HorizontalContentAlignment="Center">
-    <StackPanel Margin="20" HorizontalAlignment="Stretch">
-        <DockPanel>
-            <GroupBox Header="{DynamicResource ElementGraphicsOverrides}" Margin="0,0,10,0">
-                <StackPanel Margin="20">
-                    <CheckBox x:Name="halftone" IsChecked="True" Content="{DynamicResource Halftone}"/>
-                    <CheckBox x:Name="transparency" IsChecked="True" Content="{DynamicResource Transparency}"/>
-                    <StackPanel Margin="20,0,0,0">
-                        <Label FontWeight="Bold" Content="{DynamicResource ProjectionOptions}"/>
-                        <CheckBox x:Name="proj_line_color" IsChecked="True" Content="{DynamicResource ProjectionLineColor}"/>
-                        <CheckBox x:Name="proj_line_pattern" IsChecked="True" Content="{DynamicResource ProjectionLinePattern}"/>
-                        <CheckBox x:Name="proj_line_weight" IsChecked="True" Content="{DynamicResource ProjectionLineWeight}"/>
-                        <CheckBox x:Name="proj_fill_color" IsChecked="True" Content="{DynamicResource ProjectionFillColor}"/>
-                        <CheckBox x:Name="proj_fill_pattern" IsChecked="True" Content="{DynamicResource ProjectionFillPattern}"/>
-                        <CheckBox x:Name="proj_fill_pattern_visibility" IsChecked="True" Content="{DynamicResource ProjectionFillPatternVisibility}"/>
-                    </StackPanel>
-                    <StackPanel Margin="20,0,0,0">
-                        <Label FontWeight="Bold" Content="{DynamicResource CutOptions}"/>
-                        <CheckBox x:Name="cut_line_color" IsChecked="True" Content="{DynamicResource CutLineColor}"/>
-                        <CheckBox x:Name="cut_line_pattern" IsChecked="True" Content="{DynamicResource CutLinePattern}"/>
-                        <CheckBox x:Name="cut_line_weight" IsChecked="True" Content="{DynamicResource CutLineWeight}"/>
-                        <CheckBox x:Name="cut_fill_color" IsChecked="True" Content="{DynamicResource CutFillColor}"/>
-                        <CheckBox x:Name="cut_fill_pattern" IsChecked="True" Content="{DynamicResource CutFillPattern}"/>
-                        <CheckBox x:Name="cut_fill_pattern_visibility" IsChecked="True" Content="{DynamicResource CutFillPatternVisibility}"/>
-                    </StackPanel>
-                </StackPanel>
-            </GroupBox>
-            <GroupBox Header="{DynamicResource DimensionOverrides}">
-                <StackPanel Margin="20">
-                    <CheckBox x:Name="dim_override" IsChecked="True" Content="{DynamicResource ReplacedValue}"/>
-                    <CheckBox x:Name="dim_textposition" IsChecked="True" Content="{DynamicResource TextPosition}"/>
-                    <CheckBox x:Name="dim_above" IsChecked="True" Content="{DynamicResource AboveValue}"/>
-                    <CheckBox x:Name="dim_below" IsChecked="True" Content="{DynamicResource BelowValue}"/>
-                    <CheckBox x:Name="dim_prefix" IsChecked="True" Content="{DynamicResource PrefixValue}"/>
-                    <CheckBox x:Name="dim_suffix" IsChecked="True" Content="{DynamicResource PostfixValue}"/>
-                </StackPanel>
-            </GroupBox>
-        </DockPanel>
-        <StackPanel>
-            <Button Margin="0,20,0,0" Click="check_all" Content="{DynamicResource CheckAll}" Height="24"/>
-            <Button Margin="0,5,0,0" Click="check_none" Content="{DynamicResource CheckNone}" Height="24"/>
-            <Button Margin="0,20,0,0" Click="save_options" Content="{DynamicResource SaveOptions}" Height="24"/>
-        </StackPanel>
-    </StackPanel>
-</Window>
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/config.py b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/config.py
index 02e36653c3..67c024d244 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/config.py
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/config.py
@@ -1,6 +1,5 @@
 """Configuration window for Match tool."""
 #pylint: disable=E0401,C0111,W0613
-from pyrevit import HOST_APP
 from pyrevit import forms
 from pyrevit import script
 
@@ -33,14 +32,13 @@ def __init__(self, xaml_file_name):
         self.proj_fill_pattern_visibility.IsChecked = \
             self._config.get_option('proj_fill_pattern_visibility', True)
 
-        # projection background pattern (Revit >= 2019)
-        if HOST_APP.is_newer_than(2019, or_equal=True):
-            self.proj_bg_fill_color.IsChecked = \
-                self._config.get_option('proj_bg_fill_color', True)
-            self.proj_bg_fill_pattern.IsChecked = \
-                self._config.get_option('proj_bg_fill_pattern', True)
-            self.proj_bg_fill_pattern_visibility.IsChecked = \
-                self._config.get_option('proj_bg_fill_pattern_visibility', True)
+        # projection background pattern
+        self.proj_bg_fill_color.IsChecked = \
+            self._config.get_option('proj_bg_fill_color', True)
+        self.proj_bg_fill_pattern.IsChecked = \
+            self._config.get_option('proj_bg_fill_pattern', True)
+        self.proj_bg_fill_pattern_visibility.IsChecked = \
+            self._config.get_option('proj_bg_fill_pattern_visibility', True)
 
         # cut lines
         self.cut_line_color.IsChecked = \
@@ -58,14 +56,13 @@ def __init__(self, xaml_file_name):
         self.cut_fill_pattern_visibility.IsChecked = \
             self._config.get_option('cut_fill_pattern_visibility', True)
 
-        # cut background pattern (Revit >= 2019)
-        if HOST_APP.is_newer_than(2019, or_equal=True):
-            self.cut_bg_fill_color.IsChecked = \
-                self._config.get_option('cut_bg_fill_color', True)
-            self.cut_bg_fill_pattern.IsChecked = \
-                self._config.get_option('cut_bg_fill_pattern', True)
-            self.cut_bg_fill_pattern_visibility.IsChecked = \
-                self._config.get_option('cut_bg_fill_pattern_visibility', True)
+        # cut background pattern
+        self.cut_bg_fill_color.IsChecked = \
+            self._config.get_option('cut_bg_fill_color', True)
+        self.cut_bg_fill_pattern.IsChecked = \
+            self._config.get_option('cut_bg_fill_pattern', True)
+        self.cut_bg_fill_pattern_visibility.IsChecked = \
+            self._config.get_option('cut_bg_fill_pattern_visibility', True)
 
         # dim overrides
         self.dim_override.IsChecked = \
@@ -130,14 +127,13 @@ def save_options(self, sender, args):
         self._config.proj_fill_pattern_visibility = \
             self.proj_fill_pattern_visibility.IsChecked
 
-        # projection background pattern (Revit >= 2019)
-        if HOST_APP.is_newer_than(2019, or_equal=True):
-            self._config.proj_bg_fill_color = \
-                self.proj_bg_fill_color.IsChecked
-            self._config.proj_bg_fill_pattern = \
-                self.proj_bg_fill_pattern.IsChecked
-            self._config.proj_bg_fill_pattern_visibility = \
-                self.proj_bg_fill_pattern_visibility.IsChecked
+        # projection background pattern
+        self._config.proj_bg_fill_color = \
+            self.proj_bg_fill_color.IsChecked
+        self._config.proj_bg_fill_pattern = \
+            self.proj_bg_fill_pattern.IsChecked
+        self._config.proj_bg_fill_pattern_visibility = \
+            self.proj_bg_fill_pattern_visibility.IsChecked
 
         # cut lines
         self._config.cut_line_color = self.cut_line_color.IsChecked
@@ -150,14 +146,13 @@ def save_options(self, sender, args):
         self._config.cut_fill_pattern_visibility = \
             self.cut_fill_pattern_visibility.IsChecked
 
-        # cut background pattern (Revit >= 2019)
-        if HOST_APP.is_newer_than(2019, or_equal=True):
-            self._config.cut_bg_fill_color = \
-                self.cut_bg_fill_color.IsChecked
-            self._config.cut_bg_fill_pattern = \
-                self.cut_bg_fill_pattern.IsChecked
-            self._config.cut_bg_fill_pattern_visibility = \
-                self.cut_bg_fill_pattern_visibility.IsChecked
+        # cut background pattern
+        self._config.cut_bg_fill_color = \
+            self.cut_bg_fill_color.IsChecked
+        self._config.cut_bg_fill_pattern = \
+            self.cut_bg_fill_pattern.IsChecked
+        self._config.cut_bg_fill_pattern_visibility = \
+            self.cut_bg_fill_pattern_visibility.IsChecked
 
         # dim overrides
         self._config.dim_override = self.dim_override.IsChecked
@@ -171,7 +166,4 @@ def save_options(self, sender, args):
         self.Close()
 
 
-if HOST_APP.is_newer_than(2019, or_equal=True):
-    MatchPropConfigWindow('MatchConfigWindow.xaml').ShowDialog()
-else:
-    MatchPropConfigWindow('MatchConfigWindowLegacy.xaml').ShowDialog()
+MatchPropConfigWindow('MatchConfigWindow.xaml').ShowDialog()
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/script.py b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/script.py
index 223bf52364..a72bd6db6e 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/script.py
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Match.splitpushbutton/Match.pushbutton/script.py
@@ -1,5 +1,4 @@
 #pylint: disable=E0401,C0111,W0613,C0103
-from pyrevit import HOST_APP
 from pyrevit import revit, DB
 from pyrevit import script
 from pyrevit import forms
@@ -42,44 +41,30 @@ def setup_style_per_config(from_style, to_style):
     if my_config.get_option('proj_line_weight', True):
         to_style.SetProjectionLineWeight(from_style.ProjectionLineWeight)
 
-    if HOST_APP.is_newer_than(2019, or_equal=True):
-        if my_config.get_option('proj_fill_color', True):
-            to_style.SetSurfaceForegroundPatternColor(
-                from_style.SurfaceForegroundPatternColor
-                )
-        if my_config.get_option('proj_fill_pattern', True):
-            to_style.SetSurfaceForegroundPatternId(
-                from_style.SurfaceForegroundPatternId
-                )
-        if my_config.get_option('proj_fill_pattern_visibility', True):
-            to_style.SetSurfaceForegroundPatternVisible(
-                from_style.IsSurfaceForegroundPatternVisible
-                )
-        if my_config.get_option('proj_bg_fill_color', True):
-            to_style.SetSurfaceBackgroundPatternColor(
-                from_style.SurfaceBackgroundPatternColor
-                )
-        if my_config.get_option('proj_bg_fill_pattern', True):
-            to_style.SetSurfaceBackgroundPatternId(
-                from_style.SurfaceBackgroundPatternId
-                )
-        if my_config.get_option('proj_bg_fill_pattern_visibility', True):
-            to_style.SetSurfaceBackgroundPatternVisible(
-                from_style.IsSurfaceBackgroundPatternVisible
-                )
-    else:
-        if my_config.get_option('proj_fill_color', True):
-            to_style.SetProjectionFillColor(
-                from_style.ProjectionFillColor
-                )
-        if my_config.get_option('proj_fill_pattern', True):
-            to_style.SetProjectionFillPatternId(
-                from_style.ProjectionFillPatternId
-                )
-        if my_config.get_option('proj_fill_pattern_visibility', True):
-            to_style.SetProjectionFillPatternVisible(
-                from_style.IsProjectionFillPatternVisible
-                )
+    if my_config.get_option('proj_fill_color', True):
+        to_style.SetSurfaceForegroundPatternColor(
+            from_style.SurfaceForegroundPatternColor
+            )
+    if my_config.get_option('proj_fill_pattern', True):
+        to_style.SetSurfaceForegroundPatternId(
+            from_style.SurfaceForegroundPatternId
+            )
+    if my_config.get_option('proj_fill_pattern_visibility', True):
+        to_style.SetSurfaceForegroundPatternVisible(
+            from_style.IsSurfaceForegroundPatternVisible
+            )
+    if my_config.get_option('proj_bg_fill_color', True):
+        to_style.SetSurfaceBackgroundPatternColor(
+            from_style.SurfaceBackgroundPatternColor
+            )
+    if my_config.get_option('proj_bg_fill_pattern', True):
+        to_style.SetSurfaceBackgroundPatternId(
+            from_style.SurfaceBackgroundPatternId
+            )
+    if my_config.get_option('proj_bg_fill_pattern_visibility', True):
+        to_style.SetSurfaceBackgroundPatternVisible(
+            from_style.IsSurfaceBackgroundPatternVisible
+            )
 
     # cuts
     if my_config.get_option('cut_line_color', True):
@@ -89,44 +74,30 @@ def setup_style_per_config(from_style, to_style):
     if my_config.get_option('cut_line_weight', True):
         to_style.SetCutLineWeight(from_style.CutLineWeight)
 
-    if HOST_APP.is_newer_than(2019, or_equal=True):
-        if my_config.get_option('cut_fill_color', True):
-            to_style.SetCutForegroundPatternColor(
-                from_style.CutForegroundPatternColor
-                )
-        if my_config.get_option('cut_fill_pattern', True):
-            to_style.SetCutForegroundPatternId(
-                from_style.CutForegroundPatternId
-                )
-        if my_config.get_option('cut_fill_pattern_visibility', True):
-            to_style.SetCutForegroundPatternVisible(
-                from_style.IsCutForegroundPatternVisible
-                )
-        if my_config.get_option('cut_bg_fill_color', True):
-            to_style.SetCutBackgroundPatternColor(
-                from_style.CutBackgroundPatternColor
-                )
-        if my_config.get_option('cut_bg_fill_pattern', True):
-            to_style.SetCutBackgroundPatternId(
-                from_style.CutBackgroundPatternId
-                )
-        if my_config.get_option('cut_bg_fill_pattern_visibility', True):
-            to_style.SetCutBackgroundPatternVisible(
-                from_style.IsCutBackgroundPatternVisible
-                )
-    else:
-        if my_config.get_option('cut_fill_color', True):
-            to_style.SetCutFillColor(
-                from_style.CutFillColor
-                )
-        if my_config.get_option('cut_fill_pattern', True):
-            to_style.SetCutFillPatternId(
-                from_style.CutFillPatternId
-                )
-        if my_config.get_option('cut_fill_pattern_visibility', True):
-            to_style.SetCutFillPatternVisible(
-                from_style.IsCutFillPatternVisible
-                )
+    if my_config.get_option('cut_fill_color', True):
+        to_style.SetCutForegroundPatternColor(
+            from_style.CutForegroundPatternColor
+            )
+    if my_config.get_option('cut_fill_pattern', True):
+        to_style.SetCutForegroundPatternId(
+            from_style.CutForegroundPatternId
+            )
+    if my_config.get_option('cut_fill_pattern_visibility', True):
+        to_style.SetCutForegroundPatternVisible(
+            from_style.IsCutForegroundPatternVisible
+            )
+    if my_config.get_option('cut_bg_fill_color', True):
+        to_style.SetCutBackgroundPatternColor(
+            from_style.CutBackgroundPatternColor
+            )
+    if my_config.get_option('cut_bg_fill_pattern', True):
+        to_style.SetCutBackgroundPatternId(
+            from_style.CutBackgroundPatternId
+            )
+    if my_config.get_option('cut_bg_fill_pattern_visibility', True):
+        to_style.SetCutBackgroundPatternVisible(
+            from_style.IsCutBackgroundPatternVisible
+            )
 
 
 def get_source_style(element_id):
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Patterns.splitpushbutton/Make Pattern.pushbutton/patmaker.py b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Patterns.splitpushbutton/Make Pattern.pushbutton/patmaker.py
index a757164296..9a4fdb1a1a 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Patterns.splitpushbutton/Make Pattern.pushbutton/patmaker.py	
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Patterns.splitpushbutton/Make Pattern.pushbutton/patmaker.py	
@@ -6,7 +6,7 @@
 import re
 from math import sqrt, pi, sin, cos, degrees
 
-from pyrevit import PyRevitException, HOST_APP
+from pyrevit import PyRevitException
 from pyrevit import framework
 from pyrevit.framework import List
 from pyrevit import coreutils
@@ -710,10 +710,7 @@ def _make_filledregion(fillpattern_name, fillpattern_id):
     source_fr = filledregion_types.FirstElement()
     with revit.Transaction('Create Filled Region'):
         new_fr = source_fr.Duplicate(fillpattern_name)
-        if HOST_APP.is_newer_than(2018):
-            new_fr.ForegroundPatternId = fillpattern_id
-        else:
-            new_fr.FillPatternId = fillpattern_id
+        new_fr.ForegroundPatternId = fillpattern_id
 
 
 def _export_pat(revit_pat, export_dir):
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Patterns.splitpushbutton/Make Pattern.pushbutton/script.py b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Patterns.splitpushbutton/Make Pattern.pushbutton/script.py
index 7a02d62d92..1abcd1c054 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Patterns.splitpushbutton/Make Pattern.pushbutton/script.py	
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit1.stack/Patterns.splitpushbutton/Make Pattern.pushbutton/script.py	
@@ -184,14 +184,11 @@ def cleanup_selection(self, rvt_elements, for_model=True):
             elif isinstance(element, DB.FilledRegion):
                 bg_fillpat = \
                     revit.query.get_fillpattern_from_element(element)
-                fg_fillpat = None
-                # check for version otherwise fg_fillpat is same as bg_fillpat
-                if HOST_APP.is_newer_than(2018):
-                    fg_fillpat = \
-                        revit.query.get_fillpattern_from_element(
-                            element,
-                            background=False
-                            )
+                fg_fillpat = \
+                    revit.query.get_fillpattern_from_element(
+                        element,
+                        background=False
+                        )
                 # process both forground and background patterns
                 for fillpat in [bg_fillpat, fg_fillpat]:
                     # if available
@@ -253,13 +250,8 @@ def setup_view_scale(self):
         biparam = DB.BuiltInParameter.VIEW_SCALE_PULLDOWN_IMPERIAL
         if revit.query.is_metric(revit.doc):
             biparam = DB.BuiltInParameter.VIEW_SCALE_PULLDOWN_METRIC
-        # re issue #510 indexing the builtinparam only works on >=2015
-        if HOST_APP.is_newer_than(2014):
-            self.viewscale_tb.Text = \
-                revit.active_view.Parameter[biparam].AsValueString()
-        else:
-            self.viewscale_tb.Text = \
-                revit.active_view.get_Parameter(biparam).AsValueString()
+        self.viewscale_tb.Text = \
+            revit.active_view.Parameter[biparam].AsValueString()
 
     def pick_domain(self):
         # ask user for origin and max domain points
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit3.stack/Groups.pulldown/ColorizeGroupTypes.pushbutton/script.py b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit3.stack/Groups.pulldown/ColorizeGroupTypes.pushbutton/script.py
index fe864042d6..2aec4dc494 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit3.stack/Groups.pulldown/ColorizeGroupTypes.pushbutton/script.py
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit3.stack/Groups.pulldown/ColorizeGroupTypes.pushbutton/script.py
@@ -10,7 +10,6 @@
 import itertools
 from collections import defaultdict
 
-from pyrevit import HOST_APP
 from pyrevit import forms
 from pyrevit import revit, DB
 from pyrevit import script
@@ -131,26 +130,15 @@ def prepare_colors(groups_dict):
         else:
             color = colors[j]
             j += 1
-        if HOST_APP.is_newer_than(2019, or_equal=True):
-            groups_colors[gt_id] = (
-                DB.OverrideGraphicSettings()
-                .SetProjectionLineColor(color)
-                .SetProjectionLineWeight(6)
-                .SetSurfaceBackgroundPatternColor(color)
-                .SetCutLineColor(color)
-                .SetCutLineWeight(6)
-                .SetCutBackgroundPatternColor(color)
-            )
-        else:
-            groups_colors[gt_id] = (
-                DB.OverrideGraphicSettings()
-                .SetProjectionLineColor(color)
-                .SetProjectionLineWeight(6)
-                .SetProjectionFillColor(color)
-                .SetCutLineColor(color)
-                .SetCutLineWeight(6)
-                .SetCutFillColor(color)
-            )
+        groups_colors[gt_id] = (
+            DB.OverrideGraphicSettings()
+            .SetProjectionLineColor(color)
+            .SetProjectionLineWeight(6)
+            .SetSurfaceBackgroundPatternColor(color)
+            .SetCutLineColor(color)
+            .SetCutLineWeight(6)
+            .SetCutBackgroundPatternColor(color)
+        )
 
     return groups_colors
 
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit3.stack/Override.pulldown/Override VG.pushbutton/script.py b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit3.stack/Override.pulldown/Override VG.pushbutton/script.py
index d58a1e938a..ef89642677 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit3.stack/Override.pulldown/Override VG.pushbutton/script.py	
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit3.stack/Override.pulldown/Override VG.pushbutton/script.py	
@@ -3,7 +3,6 @@
 # pylint: disable=E0401,C0103
 from collections import OrderedDict
 
-from pyrevit import HOST_APP
 from pyrevit import revit, DB
 from pyrevit import forms
 from pyrevit import script
@@ -31,21 +30,13 @@ def colorvg(r, g, b, projline_only=False, xacn_name=None):
             ogs.SetProjectionLineColor(wireframe_color)
             ogs.SetCutLineColor(wireframe_color)
             if not projline_only:
-                if HOST_APP.is_newer_than(2018):
-                    ogs.SetSurfaceForegroundPatternColor(color)
-                    ogs.SetCutForegroundPatternColor(color)
-                else:
-                    ogs.SetProjectionFillColor(color)
-                    ogs.SetCutFillColor(color)
+                ogs.SetSurfaceForegroundPatternColor(color)
+                ogs.SetCutForegroundPatternColor(color)
 
                 solid_fpattern = revit.query.get_solid_fillpattern_element()
                 if solid_fpattern:
-                    if HOST_APP.is_newer_than(2018):
-                        ogs.SetCutForegroundPatternId(solid_fpattern.Id)
-                        ogs.SetSurfaceForegroundPatternId(solid_fpattern.Id)
-                    else:
-                        ogs.SetProjectionFillPatternId(solid_fpattern.Id)
-                        ogs.SetCutFillPatternId(solid_fpattern.Id)
+                    ogs.SetCutForegroundPatternId(solid_fpattern.Id)
+                    ogs.SetSurfaceForegroundPatternId(solid_fpattern.Id)
                 else:
                     logger.warning(
                         "Can not find solid fill pattern in model"
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Project.panel/Wipe.pulldown/Wipe Data Schema.pushbutton/script.py b/extensions/pyRevitTools.extension/pyRevit.tab/Project.panel/Wipe.pulldown/Wipe Data Schema.pushbutton/script.py
index 951725c5f6..9ea02d00de 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Project.panel/Wipe.pulldown/Wipe Data Schema.pushbutton/script.py	
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Project.panel/Wipe.pulldown/Wipe Data Schema.pushbutton/script.py	
@@ -1,7 +1,7 @@
 """Erase selected data schema and its entities."""
 
 from pyrevit import revit, DB
-from pyrevit import forms, HOST_APP
+from pyrevit import forms
 
 doc = revit.doc
 
@@ -20,12 +20,6 @@ def name(self):
 for sschema in sschemas:
     with revit.Transaction("Remove Schema"):
         try:
-            if HOST_APP.version <= 2020:
-                DB.ExtensibleStorage.Schema.EraseSchemaAndAllEntities(
-                    schema=sschema,
-                    overrideWriteAccessWithUserPermission=True
-                )
-            else:
-                doc.EraseSchemaAndAllEntities(sschema)
+            doc.EraseSchemaAndAllEntities(sschema)
         except Exception as e:
             print(e)
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Project.panel/ptools.stack/Links.pulldown/Reload Links.pushbutton/script.py b/extensions/pyRevitTools.extension/pyRevit.tab/Project.panel/ptools.stack/Links.pulldown/Reload Links.pushbutton/script.py
index 1da6250eaa..53e0f9370b 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Project.panel/ptools.stack/Links.pulldown/Reload Links.pushbutton/script.py	
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Project.panel/ptools.stack/Links.pulldown/Reload Links.pushbutton/script.py	
@@ -2,7 +2,6 @@
 Can reload links "locally" for workshared models"""
 #pylint: disable=import-error,invalid-name,broad-except,superfluous-parens
 
-from pyrevit import HOST_APP
 from pyrevit import revit, DB
 from pyrevit import forms
 from pyrevit import script
@@ -78,17 +77,14 @@ def reload_links(ref_type=DB.ExternalFileReferenceType.RevitLink):
         logger.error('Load error: %s' % reload_err)
 
 
-linktypes = {'Revit Links': DB.ExternalFileReferenceType.RevitLink}
+linktypes = {
+    'Revit Links': DB.ExternalFileReferenceType.RevitLink,
+    'CAD Links': DB.ExternalFileReferenceType.CADLink,
+}
 
-if HOST_APP.is_newer_than(2017):
-    linktypes['CAD Links'] = DB.ExternalFileReferenceType.CADLink
-
-if len(linktypes) > 1:
-    selected_option = \
-        forms.CommandSwitchWindow.show(linktypes.keys(),
-                                       message='Select link type:')
-else:
-    selected_option = 'Revit Links'
+selected_option = \
+    forms.CommandSwitchWindow.show(linktypes.keys(),
+                                   message='Select link type:')
 
 if selected_option:
     reload_links(linktypes[selected_option])
diff --git a/pyrevitlib/pyrevit/__init__.py b/pyrevitlib/pyrevit/__init__.py
index 390c8ff46a..6f6ae662b1 100644
--- a/pyrevitlib/pyrevit/__init__.py
+++ b/pyrevitlib/pyrevit/__init__.py
@@ -206,7 +206,7 @@ class _HostApplication(object):
     Examples:
             ```python
             hostapp = _HostApplication()
-            hostapp.is_newer_than(2017)
+            hostapp.is_newer_than(2022)
             ```
     """
 
@@ -275,10 +275,7 @@ def version(self):
     @property
     def subversion(self):
         """str: Return subversion number (e.g. '2018.3')."""
-        if hasattr(self.app, 'SubVersionNumber'):
-            return self.app.SubVersionNumber
-        else:
-            return '{}.0'.format(self.version)
+        return self.app.SubVersionNumber
 
     @property
     def version_name(self):
@@ -288,11 +285,9 @@ def version_name(self):
     @property
     def build(self):
         """str: Return build number (e.g. '20170927_1515(x64)')."""
-        if int(self.version) >= 2021:
-            # uses labs module that is imported later in this code
-            return labs.extract_build_from_exe(self.proc_path)
-        else:
-            return self.app.VersionBuild
+        # Revit 2021+ VersionBuild reports the same value as VersionNumber.
+        # uses labs module that is imported later in this code
+        return labs.extract_build_from_exe(self.proc_path)
 
     @property
     def serial_no(self):
@@ -309,9 +304,7 @@ def pretty_name(self):
         Returns:
             (str): Pretty name of the host
         """
-        host_name = self.version_name
-        if self.is_newer_than(2017):
-            host_name = host_name.replace(self.version, self.subversion)
+        host_name = self.version_name.replace(self.version, self.subversion)
         return "%s build: %s" % (host_name, self.build)
 
     @property
@@ -356,10 +349,7 @@ def proc_path(self):
     @property
     def proc_window(self):
         """``intptr``: Return handle to current process window."""
-        if self.is_newer_than(2019, or_equal=True):
-            return self.uiapp.MainWindowHandle
-        else:
-            return AdWindows.ComponentManager.ApplicationWindow
+        return self.uiapp.MainWindowHandle
 
     @property
     def proc_screen(self):
diff --git a/pyrevitlib/pyrevit/coreutils/applocales.py b/pyrevitlib/pyrevit/coreutils/applocales.py
index 44586a05e8..610f2aa9bc 100644
--- a/pyrevitlib/pyrevit/coreutils/applocales.py
+++ b/pyrevitlib/pyrevit/coreutils/applocales.py
@@ -119,14 +119,12 @@ def __repr__(self):
     ),
 ]
 
-# add version specific languages
-if HOST_APP.is_newer_than(2018, or_equal=True):
-    APP_LOCALES.append(
-        AppLocale(
-            lang_type=ApplicationServices.LanguageType.English_GB,
-            lang_name="English Great Britain",
-            locale_codes=["en_gb"])
-        )
+APP_LOCALES.append(
+    AppLocale(
+        lang_type=ApplicationServices.LanguageType.English_GB,
+        lang_name="English Great Britain",
+        locale_codes=["en_gb"])
+    )
 
 # add custom languages provided by this module
 APP_LOCALES.append(
diff --git a/pyrevitlib/pyrevit/coreutils/ribbon.py b/pyrevitlib/pyrevit/coreutils/ribbon.py
index 49c46c59ed..2a4c3a272d 100644
--- a/pyrevitlib/pyrevit/coreutils/ribbon.py
+++ b/pyrevitlib/pyrevit/coreutils/ribbon.py
@@ -30,9 +30,7 @@
 DEFAULT_DPI = 96
 
 DEFAULT_TOOLTIP_IMAGE_FORMAT = ".png"
-DEFAULT_TOOLTIP_VIDEO_FORMAT = ".swf"
-if HOST_APP.is_newer_than(2019, or_equal=True):
-    DEFAULT_TOOLTIP_VIDEO_FORMAT = ".mp4"
+DEFAULT_TOOLTIP_VIDEO_FORMAT = ".mp4"
 
 
 def argb_to_brush(argb_color):
@@ -1928,26 +1926,16 @@ def create_pulldown_button(self, item_name, icon_path, update_if_exists=False):
         )
 
     def create_split_button(self, item_name, icon_path, update_if_exists=False):
-        if self.itemdata_mode and HOST_APP.is_older_than("2017"):
-            raise PyRevitUIError(
-                "Revits earlier than 2017 do not support " "split buttons in a stack."
-            )
-        else:
-            self._create_button_group(
-                UI.SplitButtonData, item_name, icon_path, update_if_exists
-            )
-            self.ribbon_item(item_name).sync_with_current_item(True)
+        self._create_button_group(
+            UI.SplitButtonData, item_name, icon_path, update_if_exists
+        )
+        self.ribbon_item(item_name).sync_with_current_item(True)
 
     def create_splitpush_button(self, item_name, icon_path, update_if_exists=False):
-        if self.itemdata_mode and HOST_APP.is_older_than("2017"):
-            raise PyRevitUIError(
-                "Revits earlier than 2017 do not support " "split buttons in a stack."
-            )
-        else:
-            self._create_button_group(
-                UI.SplitButtonData, item_name, icon_path, update_if_exists
-            )
-            self.ribbon_item(item_name).sync_with_current_item(False)
+        self._create_button_group(
+            UI.SplitButtonData, item_name, icon_path, update_if_exists
+        )
+        self.ribbon_item(item_name).sync_with_current_item(False)
 
     def create_combobox(self, item_name, update_if_exists=False):
         """Create a ComboBox in the ribbon panel.
diff --git a/pyrevitlib/pyrevit/labs.py b/pyrevitlib/pyrevit/labs.py
index 369b434d38..2d6c390529 100644
--- a/pyrevitlib/pyrevit/labs.py
+++ b/pyrevitlib/pyrevit/labs.py
@@ -2,7 +2,6 @@
 import os.path as op
 #pylint: disable=W0703,C0302,C0103,W0614,E0401,W0611,C0413
 #pylint: disable=superfluous-parens,useless-import-alias
-from pyrevit import HOST_APP
 from pyrevit.framework import clr
 from pyrevit.compat import PY2
 from pyrevit._perf import mark as _perfmark
@@ -80,10 +79,6 @@ def extract_build_from_exe(proc_path):
         if pinfo.build else "20000101_0000(x64)"
 
 
-# activate binding resolver
-if HOST_APP.is_older_than(2019):
-    PyRevit.PyRevitBindings.ActivateResolver()
-
 # NLog output is configured by PyRevitLabs.PyRevit.Runtime.ScriptOutput.
 
 _perfmark("pyrevit.labs:exit")
diff --git a/pyrevitlib/pyrevit/loader/sessioninfo.py b/pyrevitlib/pyrevit/loader/sessioninfo.py
index e68a30beff..6906710521 100644
--- a/pyrevitlib/pyrevit/loader/sessioninfo.py
+++ b/pyrevitlib/pyrevit/loader/sessioninfo.py
@@ -38,12 +38,8 @@ def setup_runtime_vars():
     envvars.set_pyrevit_env_var(envvars.VERSION_ENVVAR, pyrvt_ver)
 
     # set app version env var
-    if HOST_APP.is_newer_than(2017):
-        envvars.set_pyrevit_env_var(envvars.APPVERSION_ENVVAR,
-                                    HOST_APP.subversion)
-    else:
-        envvars.set_pyrevit_env_var(envvars.APPVERSION_ENVVAR,
-                                    HOST_APP.version)
+    envvars.set_pyrevit_env_var(envvars.APPVERSION_ENVVAR,
+                                HOST_APP.subversion)
 
     # set ironpython engine version env var
     attachment = user_config.get_current_attachment()
diff --git a/pyrevitlib/pyrevit/revit/db/__init__.py b/pyrevitlib/pyrevit/revit/db/__init__.py
index 52808c1f64..b9b5f9e9ae 100644
--- a/pyrevitlib/pyrevit/revit/db/__init__.py
+++ b/pyrevitlib/pyrevit/revit/db/__init__.py
@@ -178,7 +178,6 @@ def __init__(self, param_def, param_binding=None, param_ext_def=False):
 
         self.name = self.param_def.Name
 
-        # Revit <2017 does not have the Id parameter
         self.param_id = getattr(self.param_def, 'Id', None)
 
         if HOST_APP.is_exactly(2021):
diff --git a/pyrevitlib/pyrevit/revit/db/create.py b/pyrevitlib/pyrevit/revit/db/create.py
index 3a5ff1d0b0..f3fe50f2fe 100644
--- a/pyrevitlib/pyrevit/revit/db/create.py
+++ b/pyrevitlib/pyrevit/revit/db/create.py
@@ -269,10 +269,7 @@ def create_3d_view(view_name, isometric=True, doc=None):
         else:
             nview = DB.View3D.CreatePerspective(doc, default_3dview_type)
 
-    if HOST_APP.is_newer_than("2019", or_equal=True):
-        nview.Name = view_name
-    else:
-        nview.ViewName = view_name
+    nview.Name = view_name
 
     nview.CropBoxActive = False
     nview.CropBoxVisible = False
@@ -450,10 +447,7 @@ def create_filledregion(filledregion_name, fillpattern_element, doc=None):
             )
     source_filledregion = filledregion_types.FirstElement()
     new_filledregion = source_filledregion.Duplicate(filledregion_name)
-    if HOST_APP.is_newer_than(2019, or_equal=True):
-        new_filledregion.ForegroundPatternId = fillpattern_element.Id
-    else:
-        new_filledregion.FillPatternId = fillpattern_element.Id
+    new_filledregion.ForegroundPatternId = fillpattern_element.Id
     return new_filledregion
 
 
@@ -500,10 +494,7 @@ def create_param_value_filter(
 ):
     doc = doc or DOCS.doc
 
-    if HOST_APP.is_newer_than(2019, or_equal=True):
-        rules = None
-    else:
-        rules = framework.List[DB.FilterRule]()
+    rules = None
     param_prov = DB.ParameterValueProvider(param_id)
 
     # decide how to combine the rules
@@ -556,13 +547,10 @@ def create_param_value_filter(
         if exclude:
             rule = DB.FilterInverseRule(rule)
 
-        if HOST_APP.is_newer_than(2019, or_equal=True):
-            if rules:
-                rules = logical_merge(rules, DB.ElementParameterFilter(rule))
-            else:
-                rules = DB.ElementParameterFilter(rule)
+        if rules:
+            rules = logical_merge(rules, DB.ElementParameterFilter(rule))
         else:
-            rules.Add(rule)
+            rules = DB.ElementParameterFilter(rule)
 
     # collect applicable categories
     if category_list:
diff --git a/pyrevitlib/pyrevit/revit/db/query.py b/pyrevitlib/pyrevit/revit/db/query.py
index 2069b5f3c5..597fd674e3 100644
--- a/pyrevitlib/pyrevit/revit/db/query.py
+++ b/pyrevitlib/pyrevit/revit/db/query.py
@@ -86,10 +86,7 @@ def get_name(element, title_on_sheet=False):
         if view_name:
             return view_name
         else:
-            if HOST_APP.is_newer_than("2019", or_equal=True):
-                return element.Name
-            else:
-                return element.ViewName
+            return element.Name
     if PY3:
         return element.Name
     try:
@@ -2110,22 +2107,12 @@ def get_connected_circuits(element, spare=False, space=False):
         circuit_types.append(DB.Electrical.CircuitType.Spare)
     if space:
         circuit_types.append(DB.Electrical.CircuitType.Space)
-    if HOST_APP.is_newer_than(
-        2021, or_equal=True
-    ):  # deprecation of ElectricalSystems in 2021
-        if element.MEPModel and element.MEPModel.GetElectricalSystems():
-            return [
-                x
-                for x in element.MEPModel.GetElectricalSystems()
-                if x.CircuitType in circuit_types
-            ]
-    else:
-        if element.MEPModel and element.MEPModel.ElectricalSystems:
-            return [
-                x
-                for x in element.MEPModel.ElectricalSystems
-                if x.CircuitType in circuit_types
-            ]
+    if element.MEPModel and element.MEPModel.GetElectricalSystems():
+        return [
+            x
+            for x in element.MEPModel.GetElectricalSystems()
+            if x.CircuitType in circuit_types
+        ]
 
 
 def get_element_categories(elements):
@@ -2397,14 +2384,7 @@ def get_fillpattern_from_element(element, background=True, doc=None):
     doc = doc or DOCS.doc
 
     def get_fpm_from_frtype(etype):
-        fp_id = None
-        if HOST_APP.is_newer_than(2018):
-            # return requested fill pattern (background or foreground)
-            fp_id = (
-                etype.BackgroundPatternId if background else etype.ForegroundPatternId
-            )
-        else:
-            fp_id = etype.FillPatternId
+        fp_id = etype.BackgroundPatternId if background else etype.ForegroundPatternId
         if fp_id:
             fillpat_element = doc.GetElement(fp_id)
             if fillpat_element:
@@ -3206,17 +3186,8 @@ def get_crop_region(view):
         (list[DB.CurveLoop]): list of curve loops
     """
     crsm = view.GetCropRegionShapeManager()
-    if HOST_APP.is_newer_than(2015):
-        crsm_valid = crsm.CanHaveShape
-    else:
-        crsm_valid = crsm.Valid
-
-    if crsm_valid:
-        if HOST_APP.is_newer_than(2015):
-            curve_loops = list(crsm.GetCropShape())
-        else:
-            curve_loops = [crsm.GetCropRegionShape()]
-
+    if crsm.CanHaveShape:
+        curve_loops = list(crsm.GetCropShape())
         if curve_loops:
             return curve_loops
 
diff --git a/pyrevitlib/pyrevit/revit/db/update.py b/pyrevitlib/pyrevit/revit/db/update.py
index af346dcc96..c8a7cc2d07 100644
--- a/pyrevitlib/pyrevit/revit/db/update.py
+++ b/pyrevitlib/pyrevit/revit/db/update.py
@@ -1,7 +1,7 @@
 """Helper functions to update info and elements in Revit."""
 import os.path as op
 
-from pyrevit import HOST_APP, DOCS
+from pyrevit import DOCS
 from pyrevit.framework import List
 from pyrevit import DB
 from pyrevit.revit.db import query
@@ -9,14 +9,7 @@
 
 
 def set_name(element, new_name):
-    # grab viewname correctly
-    if isinstance(element, DB.View):
-        if HOST_APP.is_newer_than('2019', or_equal=True):
-            element.Name = new_name
-        else:
-            element.ViewName = new_name
-    else:
-        element.Name = new_name
+    element.Name = new_name
 
 
 def update_sheet_revisions(revisions, sheets=None, state=True, doc=None):
@@ -78,14 +71,9 @@ def update_param_value(rvt_param, value):
 
 
 def toggle_category_visibility(view, subcat, hidden=None):
-    if HOST_APP.is_older_than(2018):
-        if hidden is None:
-            hidden = not view.GetVisibility(subcat.Id)
-        view.SetVisibility(subcat.Id, hidden)
-    else:
-        if hidden is None:
-            hidden = not view.GetCategoryHidden(subcat.Id)
-        view.SetCategoryHidden(subcat.Id, hidden)
+    if hidden is None:
+        hidden = not view.GetCategoryHidden(subcat.Id)
+    view.SetCategoryHidden(subcat.Id, hidden)
 
 
 def rename_workset(workset, new_name, doc=None):
@@ -128,10 +116,7 @@ def set_crop_region(view, curve_loops):
     view.CropBoxActive = True
     crsm = view.GetCropRegionShapeManager()
     for cloop in curve_loops:
-        if HOST_APP.is_newer_than(2015):
-            crsm.SetCropShape(cloop)
-        else:
-            crsm.SetCropRegionShape(cloop)
+        crsm.SetCropShape(cloop)
     view.CropBoxActive = crop_active_saved
 
 
diff --git a/pyrevitlib/pyrevit/revit/tabs.py b/pyrevitlib/pyrevit/revit/tabs.py
index ab7932c94d..7b18cf69b7 100644
--- a/pyrevitlib/pyrevit/revit/tabs.py
+++ b/pyrevitlib/pyrevit/revit/tabs.py
@@ -226,29 +226,28 @@ def reset_doc_colorizer():
 def init_doc_colorizer(usercfg):
     """Initialize document colorizer from settings."""
     uiapp = HOST_APP.uiapp
-    if HOST_APP.is_newer_than(2018):
-        current_tabcolorizer = \
-            envvars.get_pyrevit_env_var(envvars.TABCOLORIZER_ENVVAR)
-
-        new_theme = get_tabcoloring_theme(usercfg)
-
-        # cancel out the colorizer from previous runtime version
-        if current_tabcolorizer:
-            # TODO: adopt the previous slots state
-            # prev_theme = current_tabcolorizer.TabColoringTheme
-            # if prev_theme:
-            #     new_theme.InitSlots(prev_theme)
-            current_tabcolorizer.StopGroupingDocumentTabs()
-
-        # start or stop the document colorizer
-        types.DocumentTabEventUtils.TabColoringTheme = new_theme
-        if usercfg.colorize_docs:
-            types.DocumentTabEventUtils.StartGroupingDocumentTabs(uiapp)
-        else:
-            types.DocumentTabEventUtils.StopGroupingDocumentTabs()
-
-        # set the new colorizer
-        envvars.set_pyrevit_env_var(
-            envvars.TABCOLORIZER_ENVVAR,
-            types.DocumentTabEventUtils
-            )
+    current_tabcolorizer = \
+        envvars.get_pyrevit_env_var(envvars.TABCOLORIZER_ENVVAR)
+
+    new_theme = get_tabcoloring_theme(usercfg)
+
+    # cancel out the colorizer from previous runtime version
+    if current_tabcolorizer:
+        # TODO: adopt the previous slots state
+        # prev_theme = current_tabcolorizer.TabColoringTheme
+        # if prev_theme:
+        #     new_theme.InitSlots(prev_theme)
+        current_tabcolorizer.StopGroupingDocumentTabs()
+
+    # start or stop the document colorizer
+    types.DocumentTabEventUtils.TabColoringTheme = new_theme
+    if usercfg.colorize_docs:
+        types.DocumentTabEventUtils.StartGroupingDocumentTabs(uiapp)
+    else:
+        types.DocumentTabEventUtils.StopGroupingDocumentTabs()
+
+    # set the new colorizer
+    envvars.set_pyrevit_env_var(
+        envvars.TABCOLORIZER_ENVVAR,
+        types.DocumentTabEventUtils
+        )
diff --git a/pyrevitlib/pyrevit/runtime/__init__.py b/pyrevitlib/pyrevit/runtime/__init__.py
index 3ec98b059c..eb3558fd3a 100644
--- a/pyrevitlib/pyrevit/runtime/__init__.py
+++ b/pyrevitlib/pyrevit/runtime/__init__.py
@@ -285,8 +285,7 @@ def get_references():
                          'System.Text.RegularExpressions'])
 
     # another revit api
-    if HOST_APP.is_newer_than(2018):
-        ref_list.extend(['Xceed.Wpf.AvalonDock'])
+    ref_list.extend(['Xceed.Wpf.AvalonDock'])
 
     refs = (_get_reference_file(ref_name) for ref_name in ref_list)
     return [r for r in refs if r]
diff --git a/release/pyrevit.aip b/release/pyrevit.aip
index c8991c014f..e51df72f8b 100644
--- a/release/pyrevit.aip
+++ b/release/pyrevit.aip
@@ -2443,7 +2443,6 @@
     <ROW File="config.py_2" Component_="config.py_1" FileName="config.py" Attributes="0" SourcePath="..\extensions\pyRevitTools.extension\pyRevit.tab\Modify.panel\edit1.stack\Match.splitpushbutton\Match.pushbutton\config.py" SelfReg="false"/>
     <ROW File="icon.png_106" Component_="config.py_1" FileName="icon.png" Attributes="0" SourcePath="..\extensions\pyRevitTools.extension\pyRevit.tab\Modify.panel\edit1.stack\Match.splitpushbutton\Match.pushbutton\icon.png" SelfReg="false"/>
     <ROW File="MatchConfigWindow.xaml" Component_="config.py_1" FileName="MATCHC~1.XAM|MatchConfigWindow.xaml" Attributes="0" SourcePath="..\extensions\pyRevitTools.extension\pyRevit.tab\Modify.panel\edit1.stack\Match.splitpushbutton\Match.pushbutton\MatchConfigWindow.xaml" SelfReg="false"/>
-    <ROW File="MatchConfigWindowLegacy.xaml" Component_="config.py_1" FileName="MATCHC~2.XAM|MatchConfigWindowLegacy.xaml" Attributes="0" SourcePath="..\extensions\pyRevitTools.extension\pyRevit.tab\Modify.panel\edit1.stack\Match.splitpushbutton\Match.pushbutton\MatchConfigWindowLegacy.xaml" SelfReg="false"/>
     <ROW File="script.py_120" Component_="config.py_1" FileName="script.py" Attributes="0" SourcePath="..\extensions\pyRevitTools.extension\pyRevit.tab\Modify.panel\edit1.stack\Match.splitpushbutton\Match.pushbutton\script.py" SelfReg="false"/>
     <ROW File="tooltip.mp4_6" Component_="config.py_1" FileName="tooltip.mp4" Attributes="0" SourcePath="..\extensions\pyRevitTools.extension\pyRevit.tab\Modify.panel\edit1.stack\Match.splitpushbutton\Match.pushbutton\tooltip.mp4" SelfReg="false"/>
     <ROW File="icon.png_107" Component_="icon.png_98" FileName="icon.png" Attributes="0" SourcePath="..\extensions\pyRevitTools.extension\pyRevit.tab\Modify.panel\edit1.stack\Overkill.pushbutton\icon.png" SelfReg="false"/>

From 0e85b7625d344bb166b5d4911f7f3d60bad87ce1 Mon Sep 17 00:00:00 2001
From: Cursor Agent <cursoragent@cursor.com>
Date: Fri, 14 Aug 2026 14:45:40 +0000
Subject: [PATCH 2/6] Remove redundant min_revit_version flags below 2021

bundle.yaml minimums of 2014/2016/2019 are always satisfied now that
pyRevit requires Revit 2021+. Leave 2022+ gates and the empty test
bundle schema keys unchanged.

Co-authored-by: Jean-Marc Couffin <jmcouffin@users.noreply.github.com>
---
 .../Test DynamoBIM_Ironpython.pushbutton/bundle.yaml             | 1 -
 .../Debug.panel/Debug Dialog Config.panelbutton/bundle.yaml      | 1 -
 .../Drawing Set.panel/Keynotes.pushbutton/bundle.yaml            | 1 -
 .../Toggle Grid Bubbles by Direction.pushbutton/bundle.yaml      | 1 -
 .../3D.pulldown/Orient View To Face.pushbutton/bundle.yaml       | 1 -
 .../Project.panel/Preflight Checks.pushbutton/bundle.yaml        | 1 -
 .../toggles1.stack/Tab Coloring.smartbutton/bundle.yaml          | 1 -
 7 files changed, 7 deletions(-)

diff --git a/extensions/pyRevitDevTools.extension/pyRevitDev.tab/Debug.panel/Bundle Tests.pulldown/Test DynamoBIM_Ironpython.pushbutton/bundle.yaml b/extensions/pyRevitDevTools.extension/pyRevitDev.tab/Debug.panel/Bundle Tests.pulldown/Test DynamoBIM_Ironpython.pushbutton/bundle.yaml
index b92279c910..be9f41cd46 100644
--- a/extensions/pyRevitDevTools.extension/pyRevitDev.tab/Debug.panel/Bundle Tests.pulldown/Test DynamoBIM_Ironpython.pushbutton/bundle.yaml	
+++ b/extensions/pyRevitDevTools.extension/pyRevitDev.tab/Debug.panel/Bundle Tests.pulldown/Test DynamoBIM_Ironpython.pushbutton/bundle.yaml	
@@ -2,7 +2,6 @@ title: Test DynamoBIM
 tooltip: Balloon test for DynamoBIM, Shift + Click to Test Script set to Auto Execute, add your scripts to the trusted locations or disable the warning in the settings.
 author: "{{author}}"
 highlight: new
-min_revit_version: '2019'
 max_revit_version: '2022'
 references:
 engine:
diff --git a/extensions/pyRevitDevTools.extension/pyRevitDev.tab/Debug.panel/Debug Dialog Config.panelbutton/bundle.yaml b/extensions/pyRevitDevTools.extension/pyRevitDev.tab/Debug.panel/Debug Dialog Config.panelbutton/bundle.yaml
index e5e8edb6bc..4e02f4708d 100644
--- a/extensions/pyRevitDevTools.extension/pyRevitDev.tab/Debug.panel/Debug Dialog Config.panelbutton/bundle.yaml	
+++ b/extensions/pyRevitDevTools.extension/pyRevitDev.tab/Debug.panel/Debug Dialog Config.panelbutton/bundle.yaml	
@@ -10,7 +10,6 @@ title:
 help_url: https://www.youtube.com/channel/UC-0THIvKRd6n7T2a5aKYaGg
 author: Test User
 context: zero-doc
-min_revit_version: 2019
 tooltips:
   de_de: Panelanzeigeoptionen und Debug-Einstellungen konfigurieren
   ru: Настроить опции отображения панели и настройки отладки
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/Keynotes.pushbutton/bundle.yaml b/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/Keynotes.pushbutton/bundle.yaml
index 5c74428d75..cfee13cbaa 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/Keynotes.pushbutton/bundle.yaml	
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/Keynotes.pushbutton/bundle.yaml	
@@ -32,7 +32,6 @@ author: >-
   Ehsan Iran-Nejad (Original Author)
 
   Tay Othman (Maintainer + UI)
-min_revit_version: 2014
 tooltip:
   de_de: >-
     Bauelementschlüssel vom Projekt verwalten.
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/views.stack/Views.pulldown/Toggle Grid Bubbles by Direction.pushbutton/bundle.yaml b/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/views.stack/Views.pulldown/Toggle Grid Bubbles by Direction.pushbutton/bundle.yaml
index fc39c6980f..ea249c1dd3 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/views.stack/Views.pulldown/Toggle Grid Bubbles by Direction.pushbutton/bundle.yaml	
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Drawing Set.panel/views.stack/Views.pulldown/Toggle Grid Bubbles by Direction.pushbutton/bundle.yaml	
@@ -52,6 +52,5 @@ tooltip:
     
     Funciona tanto em vistas de planta/forro quanto em vistas de corte/elevação.
 author: Mohamed Asli
-min_revit_version: 2016
 engine:
   clean: true
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/3D.pulldown/Orient View To Face.pushbutton/bundle.yaml b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/3D.pulldown/Orient View To Face.pushbutton/bundle.yaml
index af0c9005cd..b5664a3c4a 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/3D.pulldown/Orient View To Face.pushbutton/bundle.yaml	
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/3D.pulldown/Orient View To Face.pushbutton/bundle.yaml	
@@ -19,4 +19,3 @@ tooltip:
     Diese Skript richtet die aktuelle Kamera Ansicht senkrecht auf die  gewählte Fläche aus. Das Tool erstellt eine Skizzenebene über der  gewählten Fläche für die 3D Ansicht
   pt_br: Reorienta a câmera da vista 3D atual, perpendicular à face selecionada. Esta ferramenta definirá um plano de trabalho sobre a face selecionada para desenho 3D
 context: active-3d-view
-min_revit_version: 2016
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Project.panel/Preflight Checks.pushbutton/bundle.yaml b/extensions/pyRevitTools.extension/pyRevit.tab/Project.panel/Preflight Checks.pushbutton/bundle.yaml
index ef643cfa5e..4a8ff6ffbf 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Project.panel/Preflight Checks.pushbutton/bundle.yaml	
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Project.panel/Preflight Checks.pushbutton/bundle.yaml	
@@ -38,4 +38,3 @@ tooltip:
 authors:
   - '{{author}}'
 help_url: https://www.notion.so/pyrevitlabs/Extension-Checks-0cf10ac6717b41f2915fe3341f05a223
-min_revit_version: 2019
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Toggles.panel/toggles1.stack/Tab Coloring.smartbutton/bundle.yaml b/extensions/pyRevitTools.extension/pyRevit.tab/Toggles.panel/toggles1.stack/Tab Coloring.smartbutton/bundle.yaml
index d56762aa0f..ca544a1d6c 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Toggles.panel/toggles1.stack/Tab Coloring.smartbutton/bundle.yaml	
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Toggles.panel/toggles1.stack/Tab Coloring.smartbutton/bundle.yaml	
@@ -20,5 +20,4 @@ tooltip:
     sortiert nach Projekt und Familie eingefärbt. Das verbessert den Überblick wenn man
     mehrere Projekte gleichzeitig geöffnet hat.
   pt_br: Faz o melhor possivel para separar visualmente os documentos abertos
-min_revit_version: 2019
 context: zero-doc

From e490d31448a8c3bd6639b215ec526ecfebfdde78 Mon Sep 17 00:00:00 2001
From: Roman Golev <67314258+romangolev@users.noreply.github.com>
Date: Tue, 25 Aug 2026 10:19:55 +0200
Subject: [PATCH 3/6] refactor(loader): drop legacy UIApplication field
 fallback

Remove the pre-2017 version branch in GetUIApplication along with the now-unused NEW_UIAPP_FIELD_VERSION and LEGACY_UIAPP_FIELD constants, since the minimum supported Revit version no longer requires the legacy m_application field lookup.
---
 dev/pyRevitLoader/Source/PyRevitLoaderApplication.cs | 11 ++++-------
 .../SessionManager/Constants.cs                      | 12 +-----------
 2 files changed, 5 insertions(+), 18 deletions(-)

diff --git a/dev/pyRevitLoader/Source/PyRevitLoaderApplication.cs b/dev/pyRevitLoader/Source/PyRevitLoaderApplication.cs
index 83d154ea71..74b12dd783 100644
--- a/dev/pyRevitLoader/Source/PyRevitLoaderApplication.cs
+++ b/dev/pyRevitLoader/Source/PyRevitLoaderApplication.cs
@@ -48,17 +48,14 @@ class PyRevitLoaderApplication : IExternalApplication
 
 		private static UIApplication GetUIApplication(UIControlledApplication application)
 		{
-			var versionNumber = application.ControlledApplication.VersionNumber;
-			var fieldName = int.Parse(versionNumber) >= RevitApiConstants.NEW_UIAPP_FIELD_VERSION 
-				? RevitApiConstants.MODERN_UIAPP_FIELD 
-				: RevitApiConstants.LEGACY_UIAPP_FIELD;
-			var fi = application.GetType().GetField(fieldName, BindingFlags.NonPublic | BindingFlags.Instance);
+			var fi = application.GetType().GetField(
+				RevitApiConstants.MODERN_UIAPP_FIELD, BindingFlags.NonPublic | BindingFlags.Instance);
 
 			if (fi == null)
 			{
 				throw new InvalidOperationException(
-					$"Could not find field '{fieldName}' on type '{application.GetType().FullName}'. " +
-					"The Revit API internal implementation may have changed in this version.");
+					$"Could not find field '{RevitApiConstants.MODERN_UIAPP_FIELD}' on type " +
+					$"'{application.GetType().FullName}'. The Revit API internal implementation may have changed in this version.");
 			}
 
 			return (UIApplication)fi.GetValue(application);
diff --git a/dev/pyRevitLoader/pyRevitAssemblyBuilder/SessionManager/Constants.cs b/dev/pyRevitLoader/pyRevitAssemblyBuilder/SessionManager/Constants.cs
index d520c2a4f0..cdde3223a1 100644
--- a/dev/pyRevitLoader/pyRevitAssemblyBuilder/SessionManager/Constants.cs
+++ b/dev/pyRevitLoader/pyRevitAssemblyBuilder/SessionManager/Constants.cs
@@ -68,18 +68,8 @@ internal static class ExtensionConstants
     public static class RevitApiConstants
     {
         /// <summary>
-        /// Revit version where the UIApplication field name changed.
-        /// </summary>
-        public const int NEW_UIAPP_FIELD_VERSION = 2017;
-
-        /// <summary>
-        /// Field name for UIApplication in Revit 2017 and newer.
+        /// Field name for UIApplication on UIControlledApplication.
         /// </summary>
         public const string MODERN_UIAPP_FIELD = "m_uiapplication";
-
-        /// <summary>
-        /// Field name for UIApplication in Revit versions before 2017.
-        /// </summary>
-        public const string LEGACY_UIAPP_FIELD = "m_application";
     }
 }

From 6a1c85a07e236533bcd1909e41db06c3c2df9107 Mon Sep 17 00:00:00 2001
From: Roman Golev <67314258+romangolev@users.noreply.github.com>
Date: Tue, 25 Aug 2026 10:33:38 +0200
Subject: [PATCH 4/6] refactor(runtime): drop pre-2021 Revit conditional
 branches

Strip REVIT2013..REVIT2020 preprocessor checks and their fallbacks across the pyRevitLabs.PyRevit.Runtime project since those Revit versions are no longer supported, and tighten the loader theme detector's UIThemeManager gate to REVIT2021+.
---
 dev/pyRevitLabs.PyRevit.Runtime/CLREngine.cs  |   4 -
 .../ContentEngine.cs                          |   5 -
 .../EventHandling.cs                          | 110 ------------------
 dev/pyRevitLabs.PyRevit.Runtime/EventHooks.cs |  20 ----
 .../EventTelemetry.cs                         |  68 +----------
 .../GrasshopperEngine.cs                      |   5 -
 .../ScriptCommands.cs                         |  12 +-
 .../ScriptConsoleUtils.cs                     |  17 +--
 dev/pyRevitLabs.PyRevit.Runtime/telemetry.cs  |  21 +---
 .../SessionManager/RevitThemeDetector.cs      |   2 +-
 10 files changed, 9 insertions(+), 255 deletions(-)

diff --git a/dev/pyRevitLabs.PyRevit.Runtime/CLREngine.cs b/dev/pyRevitLabs.PyRevit.Runtime/CLREngine.cs
index 73aad0aca9..9e9577b0d1 100644
--- a/dev/pyRevitLabs.PyRevit.Runtime/CLREngine.cs
+++ b/dev/pyRevitLabs.PyRevit.Runtime/CLREngine.cs
@@ -199,11 +199,7 @@ public static Assembly CompileCLRScript(ref ScriptRuntime runtime, out List<stri
 
             List<string> defines = new List<string> {
                 $"REVIT{runtime.App.VersionNumber}",
-#if (REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
-                $"REVIT{runtime.App.VersionNumber}_0"
-#else
                 $"REVIT{runtime.App.SubVersionNumber.Replace(".", "_")}"
-#endif
             };
 
             // determine which compiler to use
diff --git a/dev/pyRevitLabs.PyRevit.Runtime/ContentEngine.cs b/dev/pyRevitLabs.PyRevit.Runtime/ContentEngine.cs
index 809058403f..dd27a1359a 100644
--- a/dev/pyRevitLabs.PyRevit.Runtime/ContentEngine.cs
+++ b/dev/pyRevitLabs.PyRevit.Runtime/ContentEngine.cs
@@ -15,10 +15,6 @@ public override void Init(ref ScriptRuntime runtime) {
         }
 
         public override int Execute(ref ScriptRuntime runtime) {
-#if (REVIT2013 || REVIT2014)
-            TaskDialog.Show(PyRevitLabsConsts.ProductName, NotSupportedFeatureException.NotSupportedMessage);
-            return ScriptExecutorResultCodes.NotSupportedFeatureException;
-#else
             if (runtime.UIApp != null && runtime.UIApp.ActiveUIDocument != null) {
                 string familySourceFile = runtime.ScriptSourceFile;
                 UIDocument uidoc = runtime.UIApp.ActiveUIDocument;
@@ -91,7 +87,6 @@ out contentFamily
 
             TaskDialog.Show(PyRevitLabsConsts.ProductName, "Failed accessing Application.");
             return ScriptExecutorResultCodes.FailedLoadingContent;
-#endif
         }
     }
 
diff --git a/dev/pyRevitLabs.PyRevit.Runtime/EventHandling.cs b/dev/pyRevitLabs.PyRevit.Runtime/EventHandling.cs
index 2b5dbd1349..2b295c8637 100644
--- a/dev/pyRevitLabs.PyRevit.Runtime/EventHandling.cs
+++ b/dev/pyRevitLabs.PyRevit.Runtime/EventHandling.cs
@@ -15,10 +15,8 @@
 
 using UIFramework;
 
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018)
 using Xceed.Wpf.AvalonDock.Layout;
 using Xceed.Wpf.AvalonDock.Controls;
-#endif
 
 using pyRevitLabs.NLog;
 using pyRevitLabs.PyRevit;
@@ -87,11 +85,8 @@ public enum EventType {
     }
 
     public interface IEventTypeHandler {
-#if !(REVIT2013)
         void AddInCommandBinding_BeforeExecuted(object sender, BeforeExecutedEventArgs e);
-#endif
 
-#if !(REVIT2013 || REVIT2014)
         void Application_FamilyLoadingIntoDocument(object sender, FamilyLoadingIntoDocumentEventArgs e);
         void Application_FamilyLoadedIntoDocument(object sender, FamilyLoadedIntoDocumentEventArgs e);
         void Application_ElementTypeDuplicating(object sender, ElementTypeDuplicatingEventArgs e);
@@ -99,16 +94,9 @@ public interface IEventTypeHandler {
         void Application_DocumentWorksharingEnabled(object sender, DocumentWorksharingEnabledEventArgs e);
         void UIApplication_DockableFrameVisibilityChanged(object sender, DockableFrameVisibilityChangedEventArgs e);
         void UIApplication_DockableFrameFocusChanged(object sender, DockableFrameFocusChangedEventArgs e);
-#endif
 
-#if !(REVIT2013 || REVIT2014 || REVIT2015)
-#endif
-
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016)
         void UIApplication_FabricationPartBrowserChanged(object sender, FabricationPartBrowserChangedEventArgs e);
-#endif
 
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
         void Application_ViewExporting(object sender, ViewExportingEventArgs e);
         void Application_ViewExported(object sender, ViewExportedEventArgs e);
         void Application_LinkedResourceOpening(object sender, LinkedResourceOpeningEventArgs e);
@@ -116,11 +104,8 @@ public interface IEventTypeHandler {
         void Application_WorksharedOperationProgressChanged(object sender, WorksharedOperationProgressChangedEventArgs e);
         void UIApplication_TransferringProjectStandards(object sender, TransferringProjectStandardsEventArgs e);
         void UIApplication_TransferredProjectStandards(object sender, TransferredProjectStandardsEventArgs e);
-#endif
 
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018)
         void UIApplication_FormulaEditing(object sender, FormulaEditingEventArgs e);
-#endif
 
         void Application_ViewPrinting(object sender, ViewPrintingEventArgs e);
         void Application_ViewPrinted(object sender, ViewPrintedEventArgs e);
@@ -296,7 +281,6 @@ private static void DeactivateUpdaterListener() {
             }
         }
 
-#if (!REVIT2013)
         public static List<AddInCommandBinding> GetAllCommandBindings(UIApplication uiApp) {
             var cmdBindings = new List<AddInCommandBinding>();
             foreach (PostableCommand postableCommand in Enum.GetValues(typeof(PostableCommand))) {
@@ -311,7 +295,6 @@ public static List<AddInCommandBinding> GetAllCommandBindings(UIApplication uiAp
             }
             return cmdBindings;
         }
-#endif
 
         public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventType, string eventTarget = null, bool toggle_on = true) where T : IEventTypeHandler {
             AddInCommandBinding cmdBinding;
@@ -430,37 +413,25 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
                     break;
 
                 case EventType.Application_DocumentWorksharingEnabled:
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016)
                     if (toggle_on)
                         uiApp.Application.DocumentWorksharingEnabled += hndlr.Application_DocumentWorksharingEnabled;
                     else
                         uiApp.Application.DocumentWorksharingEnabled -= hndlr.Application_DocumentWorksharingEnabled;
                     break;
-#else
-                    throw new NotSupportedFeatureException();
-#endif
 
                 case EventType.Application_ElementTypeDuplicated:
-#if !(REVIT2013 || REVIT2014)
                     if (toggle_on)
                         uiApp.Application.ElementTypeDuplicated += hndlr.Application_ElementTypeDuplicated;
                     else
                         uiApp.Application.ElementTypeDuplicated -= hndlr.Application_ElementTypeDuplicated;
                     break;
-#else
-                    throw new NotSupportedFeatureException();
-#endif
 
                 case EventType.Application_ElementTypeDuplicating:
-#if !(REVIT2013 || REVIT2014)
                     if (toggle_on)
                         uiApp.Application.ElementTypeDuplicating += hndlr.Application_ElementTypeDuplicating;
                     else
                         uiApp.Application.ElementTypeDuplicating -= hndlr.Application_ElementTypeDuplicating;
                     break;
-#else
-                    throw new NotSupportedFeatureException();
-#endif
 
                 case EventType.Application_FailuresProcessing:
                     if (toggle_on)
@@ -470,26 +441,18 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
                     break;
 
                 case EventType.Application_FamilyLoadedIntoDocument:
-#if !(REVIT2013 || REVIT2014)
                     if (toggle_on)
                         uiApp.Application.FamilyLoadedIntoDocument += hndlr.Application_FamilyLoadedIntoDocument;
                     else
                         uiApp.Application.FamilyLoadedIntoDocument -= hndlr.Application_FamilyLoadedIntoDocument;
                     break;
-#else
-                    throw new NotSupportedFeatureException();
-#endif
 
                 case EventType.Application_FamilyLoadingIntoDocument:
-#if !(REVIT2013 || REVIT2014)
                     if (toggle_on)
                         uiApp.Application.FamilyLoadingIntoDocument += hndlr.Application_FamilyLoadingIntoDocument;
                     else
                         uiApp.Application.FamilyLoadingIntoDocument -= hndlr.Application_FamilyLoadingIntoDocument;
                     break;
-#else
-                    throw new NotSupportedFeatureException();
-#endif
 
                 case EventType.Application_FileExported:
                     if (toggle_on)
@@ -520,26 +483,18 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
                     break;
 
                 case EventType.Application_LinkedResourceOpened:
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
                     if (toggle_on)
                         uiApp.Application.LinkedResourceOpened += hndlr.Application_LinkedResourceOpened;
                     else
                         uiApp.Application.LinkedResourceOpened -= hndlr.Application_LinkedResourceOpened;
                     break;
-#else
-                    throw new NotSupportedFeatureException();
-#endif
 
                 case EventType.Application_LinkedResourceOpening:
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
                     if (toggle_on)
                         uiApp.Application.LinkedResourceOpening += hndlr.Application_LinkedResourceOpening;
                     else
                         uiApp.Application.LinkedResourceOpening -= hndlr.Application_LinkedResourceOpening;
                     break;
-#else
-                    throw new NotSupportedFeatureException();
-#endif
 
                 case EventType.Application_ProgressChanged:
                     if (toggle_on)
@@ -549,26 +504,18 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
                     break;
 
                 case EventType.Application_ViewExported:
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
                     if (toggle_on)
                         uiApp.Application.ViewExported += hndlr.Application_ViewExported;
                     else
                         uiApp.Application.ViewExported -= hndlr.Application_ViewExported;
                     break;
-#else
-                    throw new NotSupportedFeatureException();
-#endif
 
                 case EventType.Application_ViewExporting:
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
                     if (toggle_on)
                         uiApp.Application.ViewExporting += hndlr.Application_ViewExporting;
                     else
                         uiApp.Application.ViewExporting -= hndlr.Application_ViewExporting;
                     break;
-#else
-                    throw new NotSupportedFeatureException();
-#endif
 
                 case EventType.Application_ViewPrinted:
                     if (toggle_on)
@@ -585,15 +532,11 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
                     break;
 
                 case EventType.Application_WorksharedOperationProgressChanged:
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
                     if (toggle_on)
                         uiApp.Application.WorksharedOperationProgressChanged += hndlr.Application_WorksharedOperationProgressChanged;
                     else
                         uiApp.Application.WorksharedOperationProgressChanged -= hndlr.Application_WorksharedOperationProgressChanged;
                     break;
-#else
-                    throw new NotSupportedFeatureException();
-#endif
 
                 case EventType.UIApplication_ApplicationClosing:
                     if (toggle_on)
@@ -603,15 +546,11 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
                     break;
 
                 case EventType.UIApplication_DialogBoxShowing:
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016)
                     if (toggle_on)
                         uiApp.DialogBoxShowing += hndlr.UIApplication_DialogBoxShowing;
                     else
                         uiApp.DialogBoxShowing -= hndlr.UIApplication_DialogBoxShowing;
                     break;
-#else
-                    throw new NotSupportedFeatureException();
-#endif
                 case EventType.UIApplication_DisplayingOptionsDialog:
                     if (toggle_on)
                         uiApp.DisplayingOptionsDialog += hndlr.UIApplication_DisplayingOptionsDialog;
@@ -620,48 +559,32 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
                     break;
 
                 case EventType.UIApplication_DockableFrameFocusChanged:
-#if !(REVIT2013 || REVIT2014)
                     if (toggle_on)
                         uiApp.DockableFrameFocusChanged += hndlr.UIApplication_DockableFrameFocusChanged;
                     else
                         uiApp.DockableFrameFocusChanged -= hndlr.UIApplication_DockableFrameFocusChanged;
                     break;
-#else
-                    throw new NotSupportedFeatureException();
-#endif
 
                 case EventType.UIApplication_DockableFrameVisibilityChanged:
-#if !(REVIT2013 || REVIT2014)
                     if (toggle_on)
                         uiApp.DockableFrameVisibilityChanged += hndlr.UIApplication_DockableFrameVisibilityChanged;
                     else
                         uiApp.DockableFrameVisibilityChanged -= hndlr.UIApplication_DockableFrameVisibilityChanged;
                     break;
-#else
-                    throw new NotSupportedFeatureException();
-#endif
 
                 case EventType.UIApplication_FabricationPartBrowserChanged:
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016)
                     if (toggle_on)
                         uiApp.FabricationPartBrowserChanged += hndlr.UIApplication_FabricationPartBrowserChanged;
                     else
                         uiApp.FabricationPartBrowserChanged -= hndlr.UIApplication_FabricationPartBrowserChanged;
                     break;
-#else
-                    throw new NotSupportedFeatureException();
-#endif
 
                 case EventType.UIApplication_FormulaEditing:
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018)
                     if (toggle_on)
                         uiApp.FormulaEditing += hndlr.UIApplication_FormulaEditing;
                     else
                         uiApp.FormulaEditing -= hndlr.UIApplication_FormulaEditing;
                     break;
-#else
-                    throw new NotSupportedFeatureException();
-#endif
 
                 case EventType.UIApplication_Idling:
                     if (toggle_on)
@@ -672,26 +595,18 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
 
 
                 case EventType.UIApplication_TransferredProjectStandards:
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
                     if (toggle_on)
                         uiApp.TransferredProjectStandards += hndlr.UIApplication_TransferredProjectStandards;
                     else
                         uiApp.TransferredProjectStandards -= hndlr.UIApplication_TransferredProjectStandards;
                     break;
-#else
-                    throw new NotSupportedFeatureException();
-#endif
 
                 case EventType.UIApplication_TransferringProjectStandards:
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
                     if (toggle_on)
                         uiApp.TransferringProjectStandards += hndlr.UIApplication_TransferringProjectStandards;
                     else
                         uiApp.TransferringProjectStandards -= hndlr.UIApplication_TransferringProjectStandards;
                     break;
-#else
-                    throw new NotSupportedFeatureException();
-#endif
 
                 case EventType.UIApplication_ViewActivated:
                     if (toggle_on)
@@ -707,7 +622,6 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
                         uiApp.ViewActivating -= hndlr.UIApplication_ViewActivating;
                     break;
 
-#if !(REVIT2013)
                 case EventType.AddInCommandBinding_BeforeExecuted:
                     if (eventTarget == null) {
                         // activate before existing handler on ALL known commands
@@ -725,9 +639,6 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
                             cmdBinding.BeforeExecuted -= hndlr.AddInCommandBinding_BeforeExecuted;
                     }
                     break;
-#else
-                    throw new NotSupportedFeatureException();
-#endif
 
                 case EventType.AddInCommandBinding_CanExecute:
                     if (eventTarget != null) {
@@ -796,12 +707,7 @@ public class UIAppEventUtils {
         public static Visual GetWindowRoot(UIApplication uiapp) {
             IntPtr wndHndle = IntPtr.Zero;
             try {
-#if (REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018)
-                wndHndle = Autodesk.Windows.ComponentManager.ApplicationWindow;
-#else
                 wndHndle = uiapp.MainWindowHandle;
-#endif
-
             }
             catch { }
 
@@ -830,11 +736,7 @@ private static void OnDocumentChanged(object sender, DocumentChangedEventArgs e)
 
         private static void CancelAllDialogs(object sender, DialogBoxShowingEventArgs e) {
             if (e.Cancellable) {
-#if (REVIT2013 || REVIT2014)
-                e.Cancel = true;
-#else
                 e.Cancel();
-#endif
             }
             else
                 e.OverrideResult(1);
@@ -901,7 +803,6 @@ private static void PostElementPropertyUpdateRequest(Document doc, string txnNam
             _uiApp.Idling += NewElementPropertyValueUpdater;
         }
 
-#if !(REVIT2013)
         public static void PostCommandAndUpdateNewElementProperties(UIApplication uiapp, Document doc, PostableCommand postableCommand, string transactionName, BuiltInParameter bip, string value) {
             Init();
 
@@ -914,16 +815,12 @@ public static void PostCommandAndUpdateNewElementProperties(UIApplication uiapp,
 
             PostElementPropertyUpdateRequest(doc, transactionName, bip, value);
         }
-#endif
     }
 
     public class PlaceKeynoteExternalEventHandler : IExternalEventHandler {
         public string KeynoteKey = null;
-#if !(REVIT2013)
         public PostableCommand KeynoteType = PostableCommand.UserKeynote;
-#endif
         public void Execute(UIApplication uiApp) {
-#if !(REVIT2013)
             DocumentEventUtils.PostCommandAndUpdateNewElementProperties(
                 uiApp,
                 uiApp.ActiveUIDocument.Document,
@@ -932,9 +829,6 @@ public void Execute(UIApplication uiApp) {
                 BuiltInParameter.KEY_VALUE,
                 KeynoteKey
                 );
-#else
-            throw new NotSupportedFeatureException();
-#endif
         }
 
         public string GetName() {
@@ -1271,7 +1165,6 @@ public List<TabColoringRule> TabFilterRules {
 
         public List<RuleSlot> StyledDocuments => _ruleSlots.ToList();
 
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018)
         static string GetTabUniqueId(TabItem tab) {
             return $"{((LayoutDocument)tab.Header).Title}+{tab.GetHashCode()}+{tab.IsSelected}";
         }
@@ -1417,7 +1310,6 @@ void Set(TabItem tab, long docId, bool isFamilyTab) {
                 }
             }
         }
-#endif
 
         public void ClearTheme(UIApplication uiApp, IEnumerable<TabItem> docTabs) {
             foreach (TabItem tab in docTabs)
@@ -1474,7 +1366,6 @@ public static TabColoringTheme TabColoringTheme {
             }
         }
 
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018)
         public static Xceed.Wpf.AvalonDock.DockingManager GetDockingManager(UIApplication uiapp) {
             var wndRoot = (MainWindow)UIAppEventUtils.GetWindowRoot(uiapp);
             if (wndRoot != null) {
@@ -1582,7 +1473,6 @@ static void UpdateDocumentTabGroups() {
                 }
             }
         }
-#endif
     }
 
     public static class RibbonEventUtils {
diff --git a/dev/pyRevitLabs.PyRevit.Runtime/EventHooks.cs b/dev/pyRevitLabs.PyRevit.Runtime/EventHooks.cs
index b2933fccd4..a2b46e6406 100644
--- a/dev/pyRevitLabs.PyRevit.Runtime/EventHooks.cs
+++ b/dev/pyRevitLabs.PyRevit.Runtime/EventHooks.cs
@@ -213,7 +213,6 @@ public void UIApplication_ViewActivated(object sender, Autodesk.Revit.UI.Events.
             ExecuteEventHooks(EventType.UIApplication_ViewActivated, sender, e);
         }
 
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
         public void UIApplication_TransferringProjectStandards(object sender, Autodesk.Revit.UI.Events.TransferringProjectStandardsEventArgs e) {
             ExecuteEventHooks(EventType.UIApplication_TransferringProjectStandards, sender, e);
         }
@@ -221,25 +220,19 @@ public void UIApplication_TransferringProjectStandards(object sender, Autodesk.R
         public void UIApplication_TransferredProjectStandards(object sender, Autodesk.Revit.UI.Events.TransferredProjectStandardsEventArgs e) {
             ExecuteEventHooks(EventType.UIApplication_TransferredProjectStandards, sender, e);
         }
-#endif
 
         public void UIApplication_Idling(object sender, Autodesk.Revit.UI.Events.IdlingEventArgs e) {
             ExecuteEventHooks(EventType.UIApplication_Idling, sender, e);
         }
 
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018)
         public void UIApplication_FormulaEditing(object sender, Autodesk.Revit.UI.Events.FormulaEditingEventArgs e) {
             ExecuteEventHooks(EventType.UIApplication_FormulaEditing, sender, e);
         }
-#endif
 
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016)
         public void UIApplication_FabricationPartBrowserChanged(object sender, Autodesk.Revit.UI.Events.FabricationPartBrowserChangedEventArgs e) {
             ExecuteEventHooks(EventType.UIApplication_FabricationPartBrowserChanged, sender, e);
         }
-#endif
 
-#if !(REVIT2013 || REVIT2014)
         public void UIApplication_DockableFrameVisibilityChanged(object sender, Autodesk.Revit.UI.Events.DockableFrameVisibilityChangedEventArgs e) {
             ExecuteEventHooks(EventType.UIApplication_DockableFrameVisibilityChanged, sender, e);
         }
@@ -247,7 +240,6 @@ public void UIApplication_DockableFrameVisibilityChanged(object sender, Autodesk
         public void UIApplication_DockableFrameFocusChanged(object sender, Autodesk.Revit.UI.Events.DockableFrameFocusChangedEventArgs e) {
             ExecuteEventHooks(EventType.UIApplication_DockableFrameFocusChanged, sender, e);
         }
-#endif
 
         public void UIApplication_DisplayingOptionsDialog(object sender, Autodesk.Revit.UI.Events.DisplayingOptionsDialogEventArgs e) {
             ExecuteEventHooks(EventType.UIApplication_DisplayingOptionsDialog, sender, e);
@@ -261,11 +253,9 @@ public void UIApplication_ApplicationClosing(object sender, Autodesk.Revit.UI.Ev
             ExecuteEventHooks(EventType.UIApplication_ApplicationClosing, sender, e);
         }
 
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
         public void Application_WorksharedOperationProgressChanged(object sender, Autodesk.Revit.DB.Events.WorksharedOperationProgressChangedEventArgs e) {
             ExecuteEventHooks(EventType.Application_WorksharedOperationProgressChanged, sender, e);
         }
-#endif
         public void Application_ViewPrinting(object sender, Autodesk.Revit.DB.Events.ViewPrintingEventArgs e) {
             ExecuteEventHooks(EventType.Application_ViewPrinting, sender, e);
         }
@@ -274,7 +264,6 @@ public void Application_ViewPrinted(object sender, Autodesk.Revit.DB.Events.View
             ExecuteEventHooks(EventType.Application_ViewPrinted, sender, e);
         }
 
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
         public void Application_ViewExporting(object sender, Autodesk.Revit.DB.Events.ViewExportingEventArgs e) {
             ExecuteEventHooks(EventType.Application_ViewExporting, sender, e);
         }
@@ -282,12 +271,10 @@ public void Application_ViewExporting(object sender, Autodesk.Revit.DB.Events.Vi
         public void Application_ViewExported(object sender, Autodesk.Revit.DB.Events.ViewExportedEventArgs e) {
             ExecuteEventHooks(EventType.Application_ViewExported, sender, e);
         }
-#endif
         public void Application_ProgressChanged(object sender, Autodesk.Revit.DB.Events.ProgressChangedEventArgs e) {
             ExecuteEventHooks(EventType.Application_ProgressChanged, sender, e);
         }
 
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
         public void Application_LinkedResourceOpening(object sender, Autodesk.Revit.DB.Events.LinkedResourceOpeningEventArgs e) {
             ExecuteEventHooks(EventType.Application_LinkedResourceOpening, sender, e);
         }
@@ -295,7 +282,6 @@ public void Application_LinkedResourceOpening(object sender, Autodesk.Revit.DB.E
         public void Application_LinkedResourceOpened(object sender, Autodesk.Revit.DB.Events.LinkedResourceOpenedEventArgs e) {
             ExecuteEventHooks(EventType.Application_LinkedResourceOpened, sender, e);
         }
-#endif
 
         public void Application_FileImporting(object sender, Autodesk.Revit.DB.Events.FileImportingEventArgs e) {
             ExecuteEventHooks(EventType.Application_FileImporting, sender, e);
@@ -313,7 +299,6 @@ public void Application_FileExported(object sender, Autodesk.Revit.DB.Events.Fil
             ExecuteEventHooks(EventType.Application_FileExported, sender, e);
         }
 
-#if !(REVIT2013 || REVIT2014)
         public void Application_FamilyLoadingIntoDocument(object sender, Autodesk.Revit.DB.Events.FamilyLoadingIntoDocumentEventArgs e) {
             ExecuteEventHooks(EventType.Application_FamilyLoadingIntoDocument, sender, e);
         }
@@ -321,13 +306,11 @@ public void Application_FamilyLoadingIntoDocument(object sender, Autodesk.Revit.
         public void Application_FamilyLoadedIntoDocument(object sender, Autodesk.Revit.DB.Events.FamilyLoadedIntoDocumentEventArgs e) {
             ExecuteEventHooks(EventType.Application_FamilyLoadedIntoDocument, sender, e);
         }
-#endif
 
         public void Application_FailuresProcessing(object sender, Autodesk.Revit.DB.Events.FailuresProcessingEventArgs e) {
             ExecuteEventHooks(EventType.Application_FailuresProcessing, sender, e);
         }
 
-#if !(REVIT2013 || REVIT2014)
         public void Application_ElementTypeDuplicating(object sender, Autodesk.Revit.DB.Events.ElementTypeDuplicatingEventArgs e) {
             ExecuteEventHooks(EventType.Application_ElementTypeDuplicating, sender, e);
         }
@@ -338,7 +321,6 @@ public void Application_ElementTypeDuplicated(object sender, Autodesk.Revit.DB.E
         public void Application_DocumentWorksharingEnabled(object sender, Autodesk.Revit.DB.Events.DocumentWorksharingEnabledEventArgs e) {
             ExecuteEventHooks(EventType.Application_DocumentWorksharingEnabled, sender, e);
         }
-#endif
 
         public void Application_DocumentSynchronizingWithCentral(object sender, Autodesk.Revit.DB.Events.DocumentSynchronizingWithCentralEventArgs e) {
             ExecuteEventHooks(EventType.Application_DocumentSynchronizingWithCentral, sender, e);
@@ -404,11 +386,9 @@ public void Application_ApplicationInitialized(object sender, Autodesk.Revit.DB.
             ExecuteEventHooks(EventType.Application_ApplicationInitialized, sender, e);
         }
 
-#if !(REVIT2013)
         public void AddInCommandBinding_BeforeExecuted(object sender, BeforeExecutedEventArgs e) {
             ExecuteEventHooks(EventType.AddInCommandBinding_BeforeExecuted, sender, e, e.CommandId.Name);
         }
-#endif
 
         public void AddInCommandBinding_CanExecute(object sender, CanExecuteEventArgs e) {
             ExecuteEventHooks(EventType.AddInCommandBinding_CanExecute, sender, e, e.CommandId.Name);
diff --git a/dev/pyRevitLabs.PyRevit.Runtime/EventTelemetry.cs b/dev/pyRevitLabs.PyRevit.Runtime/EventTelemetry.cs
index b9885802a7..d167dbce83 100644
--- a/dev/pyRevitLabs.PyRevit.Runtime/EventTelemetry.cs
+++ b/dev/pyRevitLabs.PyRevit.Runtime/EventTelemetry.cs
@@ -162,17 +162,9 @@ public static Dictionary<string, object> GetPrintSettings(PrintParameters printP
                     { "hide_cropbounds", printParams.HideCropBoundaries },
                     { "hide_refplanes", printParams.HideReforWorkPlanes },
                     { "hide_scopeboxes", printParams.HideScopeBoxes },
-#if !(REVIT2013)
                     { "hide_unref_viewtags", printParams.HideUnreferencedViewTags },
-#else
-                    { "hide_unref_viewtags", null },
-#endif
                     { "margin_type", printParams.MarginType.ToString() },
-#if !(REVIT2013 || REVIT2014)
                     { "mask_lines", printParams.MaskCoincidentLines },
-#else
-                    { "mask_lines", null },
-#endif
                     { "page_orientation", printParams.PageOrientation.ToString() },
                     { "paper_placement", printParams.PaperPlacement.ToString() },
                     { "paper_size", printParams.PaperSize.Name },
@@ -210,7 +202,7 @@ public static Dictionary<string, object> GetProjectInfo(Document doc) {
 
                 var docProjProps = new Dictionary<string, object>();
                 foreach (Parameter param in pinfo.Parameters)
-#if !(REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020 || REVIT2021 || REVIT2022 || REVIT2023)
+#if !(REVIT2021 || REVIT2022 || REVIT2023)
                     if (param.Id.Value > 0)
 #else
                     if (param.Id.IntegerValue > 0)
@@ -337,7 +329,6 @@ public void UIApplication_ViewActivated(object sender, Autodesk.Revit.UI.Events.
             }, sender, e);
         }
 
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
         public void UIApplication_TransferringProjectStandards(object sender, Autodesk.Revit.UI.Events.TransferringProjectStandardsEventArgs e) {
             var extItems = new Dictionary<string, string>();
             foreach (var kvpair in e.GetExternalItems())
@@ -387,7 +378,6 @@ public void UIApplication_TransferredProjectStandards(object sender, Autodesk.Re
                 }
             }, sender, e);
         }
-#endif
 
         public void UIApplication_Idling(object sender, Autodesk.Revit.UI.Events.IdlingEventArgs e) {
             LogEventTelemetryRecord(new EventTelemetryRecord {
@@ -395,10 +385,9 @@ public void UIApplication_Idling(object sender, Autodesk.Revit.UI.Events.IdlingE
             }, sender, e);
         }
 
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018)
         public void UIApplication_FormulaEditing(object sender, Autodesk.Revit.UI.Events.FormulaEditingEventArgs e) {
             var paramId = e.ParameterId;
-#if !(REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020 || REVIT2021 || REVIT2022 || REVIT2023)
+#if !(REVIT2021 || REVIT2022 || REVIT2023)
             long paramIdInt = 0;
 #else
             int paramIdInt = 0;
@@ -407,7 +396,7 @@ public void UIApplication_FormulaEditing(object sender, Autodesk.Revit.UI.Events
             Element param = null;
             if (paramId != null && paramId != ElementId.InvalidElementId) {
                 param = e.CurrentDocument != null ? e.CurrentDocument.GetElement(paramId) : param;
-#if !(REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020 || REVIT2021 || REVIT2022 || REVIT2023)
+#if !(REVIT2021 || REVIT2022 || REVIT2023)
                 paramIdInt = paramId.Value;
 #else
                 paramIdInt = paramId.IntegerValue;
@@ -427,9 +416,7 @@ public void UIApplication_FormulaEditing(object sender, Autodesk.Revit.UI.Events
                 }
             }, sender, e);
         }
-#endif
 
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016)
             public void UIApplication_FabricationPartBrowserChanged(object sender, Autodesk.Revit.UI.Events.FabricationPartBrowserChangedEventArgs e) {
             // TODO: implement
             //e.GetAllSolutionsPartsTypeCounts
@@ -446,9 +433,7 @@ public void UIApplication_FabricationPartBrowserChanged(object sender, Autodesk.
                 }
             }, sender, e);
         }
-#endif
 
-#if !(REVIT2013 || REVIT2014)
         public void UIApplication_DockableFrameVisibilityChanged(object sender, Autodesk.Revit.UI.Events.DockableFrameVisibilityChangedEventArgs e) {
             LogEventTelemetryRecord(new EventTelemetryRecord {
                 type = EventUtils.GetEventName(EventType.UIApplication_DockableFrameVisibilityChanged),
@@ -468,7 +453,6 @@ public void UIApplication_DockableFrameFocusChanged(object sender, Autodesk.Revi
                 }
             }, sender, e);
         }
-#endif
 
         public void UIApplication_DisplayingOptionsDialog(object sender, Autodesk.Revit.UI.Events.DisplayingOptionsDialogEventArgs e) {
             LogEventTelemetryRecord(new EventTelemetryRecord {
@@ -483,11 +467,7 @@ public void UIApplication_DialogBoxShowing(object sender, Autodesk.Revit.UI.Even
             LogEventTelemetryRecord(new EventTelemetryRecord {
                 type = EventUtils.GetEventName(EventType.UIApplication_DialogBoxShowing),
                 args = new Dictionary<string, object> {
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016)
                     { "dialog_id", e.DialogId },
-#else
-                    { "dialog_id", null },
-#endif
                 }
             }, sender, e);
         }
@@ -498,7 +478,6 @@ public void UIApplication_ApplicationClosing(object sender, Autodesk.Revit.UI.Ev
             }, sender, e);
         }
 
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
         public void Application_WorksharedOperationProgressChanged(object sender, WorksharedOperationProgressChangedEventArgs e) {
             LogEventTelemetryRecord(new EventTelemetryRecord {
                 type = EventUtils.GetEventName(EventType.Application_WorksharedOperationProgressChanged),
@@ -506,7 +485,6 @@ public void Application_WorksharedOperationProgressChanged(object sender, Worksh
                 status = e.Status.ToString(),
             }, sender, e);
         }
-#endif
 
         public void Application_ViewPrinting(object sender, ViewPrintingEventArgs e) {
             var views = new List<Element>() { e.View };
@@ -520,11 +498,7 @@ public void Application_ViewPrinting(object sender, ViewPrintingEventArgs e) {
                     { "view", GetViewsData(views) },
                     { "view_index", e.Index },
                     { "total_views", e.TotalViews },
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016)
                     { "settings", GetPrintSettings(e.GetSettings().PrintParameters) },
-#else
-                    { "settings", null },
-#endif
                 }
             }, sender, e);
         }
@@ -546,7 +520,6 @@ public void Application_ViewPrinted(object sender, ViewPrintedEventArgs e) {
             }, sender, e);
         }
 
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
         public void Application_ViewExporting(object sender, ViewExportingEventArgs e) {
             var views = new List<Element>();
             if (e.Document != null)
@@ -581,7 +554,6 @@ public void Application_ViewExported(object sender, ViewExportedEventArgs e) {
                 }
             }, sender, e);
         }
-#endif
 
         public void Application_ProgressChanged(object sender, ProgressChangedEventArgs e) {
             LogEventTelemetryRecord(new EventTelemetryRecord {
@@ -596,7 +568,6 @@ public void Application_ProgressChanged(object sender, ProgressChangedEventArgs
             }, sender, e);
         }
 
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
         public void Application_LinkedResourceOpening(object sender, LinkedResourceOpeningEventArgs e) {
             LogEventTelemetryRecord(new EventTelemetryRecord {
                 type = EventUtils.GetEventName(EventType.Application_LinkedResourceOpening),
@@ -621,7 +592,6 @@ public void Application_LinkedResourceOpened(object sender, LinkedResourceOpened
                 }
             }, sender, e);
         }
-#endif
 
         public void Application_FileImporting(object sender, FileImportingEventArgs e) {
             LogEventTelemetryRecord(new EventTelemetryRecord {
@@ -681,7 +651,6 @@ public void Application_FileExported(object sender, FileExportedEventArgs e) {
             }, sender, e);
         }
 
-#if !(REVIT2013 || REVIT2014)
         public void Application_FamilyLoadingIntoDocument(object sender, FamilyLoadingIntoDocumentEventArgs e) {
             LogEventTelemetryRecord(new EventTelemetryRecord {
                 type = EventUtils.GetEventName(EventType.Application_FamilyLoadingIntoDocument),
@@ -734,7 +703,6 @@ public void Application_FamilyLoadedIntoDocument(object sender, FamilyLoadedInto
                 }
             }, sender, e);
         }
-#endif
 
         public void Application_FailuresProcessing(object sender, FailuresProcessingEventArgs e) {
             Document doc = null;
@@ -789,7 +757,6 @@ public void Application_FailuresProcessing(object sender, FailuresProcessingEven
             }, sender, e);
         }
 
-#if !(REVIT2013 || REVIT2014)
         public void Application_ElementTypeDuplicating(object sender, ElementTypeDuplicatingEventArgs e) {
             var doc = e.Document;
             string typeCategory = string.Empty;
@@ -842,7 +809,7 @@ public void Application_ElementTypeDuplicated(object sender, ElementTypeDuplicat
                     { "category", typeCategory },
                     { "from_typename", origTypeName },
                     { "to_typename", e.NewName },
-#if !(REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020 || REVIT2021 || REVIT2022 || REVIT2023)
+#if !(REVIT2021 || REVIT2022 || REVIT2023)
                     { "to_typeid", e.NewElementTypeId.Value },
 #else
                     { "to_typeid", e.NewElementTypeId.IntegerValue },
@@ -861,7 +828,6 @@ public void Application_DocumentWorksharingEnabled(object sender, DocumentWorksh
                 projectname = GetProjectName(doc),
             }, sender, e);
         }
-#endif
 
         public void Application_DocumentSynchronizingWithCentral(object sender, DocumentSynchronizingWithCentralEventArgs e) {
             var syncOpts = e.Options;
@@ -875,25 +841,15 @@ public void Application_DocumentSynchronizingWithCentral(object sender, Document
                     { "comments", e.Comments },
                     { "location", e.Location },
                     { "options", new Dictionary<string,object> {
-#if !(REVIT2013)
                         { "comment", syncOpts.Comment },
                         { "compact", syncOpts.Compact },
-#else
-                        { "comment", null },
-                        { "compact", null },
-#endif
                         { "relinquish_borrowed", syncOpts.RelinquishBorrowedElements },
                         { "relinquish_family_worksets", syncOpts.RelinquishFamilyWorksets },
                         { "relinquish_projectstd_worksets", syncOpts.RelinquishProjectStandardWorksets },
                         { "relinquish_user_worksets", syncOpts.RelinquishUserCreatedWorksets },
                         { "relinquish_view_worksets", syncOpts.RelinquishViewWorksets },
-#if !(REVIT2013)
                         { "save_local_after", syncOpts.SaveLocalAfter },
                         { "save_local_before", syncOpts.SaveLocalBefore },
-#else
-                        { "save_local_after", null },
-                        { "save_local_before", null },
-#endif
                     } },
                 }
             }, sender, e);
@@ -920,12 +876,7 @@ public void Application_DocumentSavingAs(object sender, DocumentSavingAsEventArg
                 projectnum = GetProjectNumber(e.Document),
                 projectname = GetProjectName(e.Document),
                 args = new Dictionary<string, object> {
-#if (REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020 || REVIT2021_0)
-                    { "as_master_file", e.IsSavingAsMasterFile },
-#else
-                    // this change was made in Revit 2021.1
                     { "as_master_file", e.IsSavingAsCentralFile },
-#endif
                     { "path", e.PathName },
                 }
             }, sender, e);
@@ -940,12 +891,7 @@ public void Application_DocumentSavedAs(object sender, DocumentSavedAsEventArgs
                 projectname = GetProjectName(e.Document),
                 status = e.Status.ToString(),
                 args = new Dictionary<string, object> {
-#if (REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020 || REVIT2021_0)
-                    { "as_master_file", e.IsSavingAsMasterFile },
-#else
-                    // this change was made in Revit 2021.1
                     { "as_master_file", e.IsSavingAsCentralFile },
-#endif
                     { "original_path",  e.OriginalPath },
                     { "project_info", GetProjectInfo(e.Document) }
                 }
@@ -985,11 +931,7 @@ public void Application_DocumentPrinting(object sender, DocumentPrintingEventArg
                 projectname = GetProjectName(e.Document),
                 args = new Dictionary<string, object> {
                 { "views", GetViewsData(GetElements(e.Document, e.GetViewElementIds())) },
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016)
                 { "settings", GetPrintSettings(e.GetSettings().PrintParameters) },
-#else
-                { "settings", null },
-#endif
                 }
             }, sender, e);
         }
@@ -1096,7 +1038,6 @@ public void Application_ApplicationInitialized(object sender, ApplicationInitial
             }, sender, e);
         }
 
-#if !(REVIT2013)
         public void AddInCommandBinding_BeforeExecuted(object sender, BeforeExecutedEventArgs e) {
             var doc = e.ActiveDocument;
             LogEventTelemetryRecord(new EventTelemetryRecord {
@@ -1110,7 +1051,6 @@ public void AddInCommandBinding_BeforeExecuted(object sender, BeforeExecutedEven
                 }
             }, sender, e);
         }
-#endif
 
         public void AddInCommandBinding_CanExecute(object sender, CanExecuteEventArgs e) {
             // do nothing. no interesting telemetry data
diff --git a/dev/pyRevitLabs.PyRevit.Runtime/GrasshopperEngine.cs b/dev/pyRevitLabs.PyRevit.Runtime/GrasshopperEngine.cs
index 9081e2b5ff..15dbe821c2 100644
--- a/dev/pyRevitLabs.PyRevit.Runtime/GrasshopperEngine.cs
+++ b/dev/pyRevitLabs.PyRevit.Runtime/GrasshopperEngine.cs
@@ -28,13 +28,8 @@ public override int Execute(ref ScriptRuntime runtime) {
                     if (methodInfo.Name == "Execute" && methodParams.Count() == 5) {
 
                         View activeView = null;
-#if !(REVIT2013 || REVIT2014)
                         if (runtime.UIApp != null && runtime.UIApp.ActiveUIDocument != null)
                             activeView = runtime.UIApp.ActiveUIDocument.ActiveGraphicalView;
-#else
-                        if (runtime.UIApp != null && runtime.UIApp.ActiveUIDocument != null)
-                            activeView = runtime.UIApp.ActiveUIDocument.ActiveView;
-#endif
 
                         // run the script
                         if (runtime.UIApp != null) {
diff --git a/dev/pyRevitLabs.PyRevit.Runtime/ScriptCommands.cs b/dev/pyRevitLabs.PyRevit.Runtime/ScriptCommands.cs
index f225e3125f..d6b0730733 100644
--- a/dev/pyRevitLabs.PyRevit.Runtime/ScriptCommands.cs
+++ b/dev/pyRevitLabs.PyRevit.Runtime/ScriptCommands.cs
@@ -566,13 +566,9 @@ public override bool IsMatch(UIApplication uiApp, CategorySet selectedCategories
                                 return false;
                             break;
                         case DocumentType.CloudProject:
-#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018 || (REVIT2019 && !REVIT2019_1) )
                             if (uiApp.ActiveUIDocument.Document.IsFamilyDocument || !uiApp.ActiveUIDocument.Document.IsModelInCloud)
                                 return false;
                             break;
-#else
-                            return false;
-#endif
                         case DocumentType.Family:
                             if (!uiApp.ActiveUIDocument.Document.IsFamilyDocument)
                                 return false;
@@ -613,11 +609,7 @@ public override bool IsMatch(UIApplication uiApp, CategorySet selectedCategories
                     // check active views
                     if (_viewTypes.Count > 0) {
                         if (HasDocument(uiApp))
-#if (REVIT2013 || REVIT2014)
-                            return _viewTypes.Contains(uiApp.ActiveUIDocument.ActiveView.ViewType);
-#else
                             return _viewTypes.Contains(uiApp.ActiveUIDocument.ActiveGraphicalView.ViewType);
-#endif
                     }
                     else
                         return true;
@@ -660,7 +652,7 @@ public override bool IsMatch(UIApplication uiApp, CategorySet selectedCategories
                     try {
                         foreach (Category category in selectedCategories)
                         {
-#if !(REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020 || REVIT2021 || REVIT2022 || REVIT2023)
+#if !(REVIT2021 || REVIT2022 || REVIT2023)
                             if (category.Id.Value == _categoryId)
 #else
                             if (category.Id.IntegerValue == _categoryId)
@@ -676,7 +668,7 @@ public override bool IsMatch(UIApplication uiApp, CategorySet selectedCategories
 
             public override bool IsMatch(Category category) {
                 try {
-#if !(REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020 || REVIT2021 || REVIT2022 || REVIT2023)
+#if !(REVIT2021 || REVIT2022 || REVIT2023)
                     return category.Id.Value == _categoryId;
 #else
                     return category.Id.IntegerValue == _categoryId;
diff --git a/dev/pyRevitLabs.PyRevit.Runtime/ScriptConsoleUtils.cs b/dev/pyRevitLabs.PyRevit.Runtime/ScriptConsoleUtils.cs
index a29bcb1d26..b1e7424847 100644
--- a/dev/pyRevitLabs.PyRevit.Runtime/ScriptConsoleUtils.cs
+++ b/dev/pyRevitLabs.PyRevit.Runtime/ScriptConsoleUtils.cs
@@ -5,10 +5,6 @@
 using Autodesk.Revit.DB;
 using Autodesk.Revit.UI;
 
-#if (REVIT2013 || REVIT2014)
-using Autodesk.Revit.UI.Selection;
-#endif
-
 namespace PyRevitLabs.PyRevit.Runtime {
     public class ScriptConsoleUtils {
         public static void ProcessUrl(UIApplication uiApp, string inputUrl, ScriptConsole output = null) {
@@ -21,7 +17,7 @@ public static void ProcessUrl(UIApplication uiApp, string inputUrl, ScriptConsol
             if (parsedQuery["command"] == "select" && parsedQuery["element[]"] != null) {
                 var idList = new List<ElementId>();
                 foreach (string strId in parsedQuery["element[]"].Split(',')) {
-#if !(REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020 || REVIT2021 || REVIT2022 || REVIT2023)
+#if !(REVIT2021 || REVIT2022 || REVIT2023)
                     idList.Add(new ElementId(Convert.ToInt64(strId)));
 #else
                     idList.Add(new ElementId(Convert.ToInt32(strId)));
@@ -132,18 +128,7 @@ public static void SelectElements(UIApplication uiApp, List<ElementId> elementId
 
                 // now select the element(s)
 
-#if (REVIT2013 || REVIT2014)
-                var elementSet = SelElementSet.Create();
-                foreach (ElementId elId in validElementIds) {
-                    var element = doc.GetElement(elId);
-                    if (element != null)
-                        elementSet.Add(element);
-                }
-
-                uidoc.Selection.Elements = elementSet;
-#else
                 uidoc.Selection.SetElementIds(validElementIds);
-#endif
 
             }
 
diff --git a/dev/pyRevitLabs.PyRevit.Runtime/telemetry.cs b/dev/pyRevitLabs.PyRevit.Runtime/telemetry.cs
index 779341ef41..612d7bb1da 100644
--- a/dev/pyRevitLabs.PyRevit.Runtime/telemetry.cs
+++ b/dev/pyRevitLabs.PyRevit.Runtime/telemetry.cs
@@ -35,9 +35,7 @@ public TelemetryRecord() {
     }
 
     public static class Telemetry {
-#if REVIT2021_OR_GREATER
-        private static string _exeBuild = null;  
-#endif
+        private static string _exeBuild = null;
 
 
         public static string DefaultUser { get; set; } = string.Empty;
@@ -127,22 +125,6 @@ public static string GetRevitBuild(object source) {
             // determine build number
             string revitbuild = string.Empty;
 
-#if (REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020)
-            switch (source) {
-                case UIControlledApplication uictrlapp:
-                    revitbuild = uictrlapp.ControlledApplication.VersionBuild;
-                    break;
-                case UIApplication uiapp:
-                    revitbuild = uiapp.Application.VersionBuild;
-                    break;
-                case ControlledApplication ctrlapp:
-                    revitbuild = ctrlapp.VersionBuild;
-                    break;
-                case Application app:
-                    revitbuild = app.VersionBuild;
-                    break;
-            }
-#else
             // Revit 2021 has a bug on .VersionBuild
             // it reports identical value as .VersionNumber
             // let's give a invalid, but correctly formatted value to the telemetry server
@@ -158,7 +140,6 @@ public static string GetRevitBuild(object source) {
             }
             else
                 revitbuild = _exeBuild;
-#endif
             return revitbuild;
         }
     }
diff --git a/dev/pyRevitLoader/pyRevitAssemblyBuilder/SessionManager/RevitThemeDetector.cs b/dev/pyRevitLoader/pyRevitAssemblyBuilder/SessionManager/RevitThemeDetector.cs
index 152154613f..eb80aa7ea8 100644
--- a/dev/pyRevitLoader/pyRevitAssemblyBuilder/SessionManager/RevitThemeDetector.cs
+++ b/dev/pyRevitLoader/pyRevitAssemblyBuilder/SessionManager/RevitThemeDetector.cs
@@ -28,7 +28,7 @@ public bool IsDarkTheme()
                 
             try
             {
-#if (REVIT2019 || REVIT2020 || REVIT2021 || REVIT2022 || REVIT2023)
+#if (REVIT2021 || REVIT2022 || REVIT2023)
                 // UIThemeManager not available before Revit 2024
                 _cachedTheme = false;
                 _themeDetected = true;

From 393b515793ed8f85e452c29cc64a1c492b8d57bc Mon Sep 17 00:00:00 2001
From: Roman Golev <67314258+romangolev@users.noreply.github.com>
Date: Tue, 25 Aug 2026 11:30:50 +0200
Subject: [PATCH 5/6] Revert "refactor(runtime): drop pre-2021 Revit
 conditional branches"

This reverts commit 6a1c85a07e236533bcd1909e41db06c3c2df9107.
---
 dev/pyRevitLabs.PyRevit.Runtime/CLREngine.cs  |   4 +
 .../ContentEngine.cs                          |   5 +
 .../EventHandling.cs                          | 110 ++++++++++++++++++
 dev/pyRevitLabs.PyRevit.Runtime/EventHooks.cs |  20 ++++
 .../EventTelemetry.cs                         |  68 ++++++++++-
 .../GrasshopperEngine.cs                      |   5 +
 .../ScriptCommands.cs                         |  12 +-
 .../ScriptConsoleUtils.cs                     |  17 ++-
 dev/pyRevitLabs.PyRevit.Runtime/telemetry.cs  |  21 +++-
 .../SessionManager/RevitThemeDetector.cs      |   2 +-
 10 files changed, 255 insertions(+), 9 deletions(-)

diff --git a/dev/pyRevitLabs.PyRevit.Runtime/CLREngine.cs b/dev/pyRevitLabs.PyRevit.Runtime/CLREngine.cs
index 9e9577b0d1..73aad0aca9 100644
--- a/dev/pyRevitLabs.PyRevit.Runtime/CLREngine.cs
+++ b/dev/pyRevitLabs.PyRevit.Runtime/CLREngine.cs
@@ -199,7 +199,11 @@ public static Assembly CompileCLRScript(ref ScriptRuntime runtime, out List<stri
 
             List<string> defines = new List<string> {
                 $"REVIT{runtime.App.VersionNumber}",
+#if (REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
+                $"REVIT{runtime.App.VersionNumber}_0"
+#else
                 $"REVIT{runtime.App.SubVersionNumber.Replace(".", "_")}"
+#endif
             };
 
             // determine which compiler to use
diff --git a/dev/pyRevitLabs.PyRevit.Runtime/ContentEngine.cs b/dev/pyRevitLabs.PyRevit.Runtime/ContentEngine.cs
index dd27a1359a..809058403f 100644
--- a/dev/pyRevitLabs.PyRevit.Runtime/ContentEngine.cs
+++ b/dev/pyRevitLabs.PyRevit.Runtime/ContentEngine.cs
@@ -15,6 +15,10 @@ public override void Init(ref ScriptRuntime runtime) {
         }
 
         public override int Execute(ref ScriptRuntime runtime) {
+#if (REVIT2013 || REVIT2014)
+            TaskDialog.Show(PyRevitLabsConsts.ProductName, NotSupportedFeatureException.NotSupportedMessage);
+            return ScriptExecutorResultCodes.NotSupportedFeatureException;
+#else
             if (runtime.UIApp != null && runtime.UIApp.ActiveUIDocument != null) {
                 string familySourceFile = runtime.ScriptSourceFile;
                 UIDocument uidoc = runtime.UIApp.ActiveUIDocument;
@@ -87,6 +91,7 @@ out contentFamily
 
             TaskDialog.Show(PyRevitLabsConsts.ProductName, "Failed accessing Application.");
             return ScriptExecutorResultCodes.FailedLoadingContent;
+#endif
         }
     }
 
diff --git a/dev/pyRevitLabs.PyRevit.Runtime/EventHandling.cs b/dev/pyRevitLabs.PyRevit.Runtime/EventHandling.cs
index 2b295c8637..2b5dbd1349 100644
--- a/dev/pyRevitLabs.PyRevit.Runtime/EventHandling.cs
+++ b/dev/pyRevitLabs.PyRevit.Runtime/EventHandling.cs
@@ -15,8 +15,10 @@
 
 using UIFramework;
 
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018)
 using Xceed.Wpf.AvalonDock.Layout;
 using Xceed.Wpf.AvalonDock.Controls;
+#endif
 
 using pyRevitLabs.NLog;
 using pyRevitLabs.PyRevit;
@@ -85,8 +87,11 @@ public enum EventType {
     }
 
     public interface IEventTypeHandler {
+#if !(REVIT2013)
         void AddInCommandBinding_BeforeExecuted(object sender, BeforeExecutedEventArgs e);
+#endif
 
+#if !(REVIT2013 || REVIT2014)
         void Application_FamilyLoadingIntoDocument(object sender, FamilyLoadingIntoDocumentEventArgs e);
         void Application_FamilyLoadedIntoDocument(object sender, FamilyLoadedIntoDocumentEventArgs e);
         void Application_ElementTypeDuplicating(object sender, ElementTypeDuplicatingEventArgs e);
@@ -94,9 +99,16 @@ public interface IEventTypeHandler {
         void Application_DocumentWorksharingEnabled(object sender, DocumentWorksharingEnabledEventArgs e);
         void UIApplication_DockableFrameVisibilityChanged(object sender, DockableFrameVisibilityChangedEventArgs e);
         void UIApplication_DockableFrameFocusChanged(object sender, DockableFrameFocusChangedEventArgs e);
+#endif
 
+#if !(REVIT2013 || REVIT2014 || REVIT2015)
+#endif
+
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016)
         void UIApplication_FabricationPartBrowserChanged(object sender, FabricationPartBrowserChangedEventArgs e);
+#endif
 
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
         void Application_ViewExporting(object sender, ViewExportingEventArgs e);
         void Application_ViewExported(object sender, ViewExportedEventArgs e);
         void Application_LinkedResourceOpening(object sender, LinkedResourceOpeningEventArgs e);
@@ -104,8 +116,11 @@ public interface IEventTypeHandler {
         void Application_WorksharedOperationProgressChanged(object sender, WorksharedOperationProgressChangedEventArgs e);
         void UIApplication_TransferringProjectStandards(object sender, TransferringProjectStandardsEventArgs e);
         void UIApplication_TransferredProjectStandards(object sender, TransferredProjectStandardsEventArgs e);
+#endif
 
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018)
         void UIApplication_FormulaEditing(object sender, FormulaEditingEventArgs e);
+#endif
 
         void Application_ViewPrinting(object sender, ViewPrintingEventArgs e);
         void Application_ViewPrinted(object sender, ViewPrintedEventArgs e);
@@ -281,6 +296,7 @@ private static void DeactivateUpdaterListener() {
             }
         }
 
+#if (!REVIT2013)
         public static List<AddInCommandBinding> GetAllCommandBindings(UIApplication uiApp) {
             var cmdBindings = new List<AddInCommandBinding>();
             foreach (PostableCommand postableCommand in Enum.GetValues(typeof(PostableCommand))) {
@@ -295,6 +311,7 @@ public static List<AddInCommandBinding> GetAllCommandBindings(UIApplication uiAp
             }
             return cmdBindings;
         }
+#endif
 
         public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventType, string eventTarget = null, bool toggle_on = true) where T : IEventTypeHandler {
             AddInCommandBinding cmdBinding;
@@ -413,25 +430,37 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
                     break;
 
                 case EventType.Application_DocumentWorksharingEnabled:
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016)
                     if (toggle_on)
                         uiApp.Application.DocumentWorksharingEnabled += hndlr.Application_DocumentWorksharingEnabled;
                     else
                         uiApp.Application.DocumentWorksharingEnabled -= hndlr.Application_DocumentWorksharingEnabled;
                     break;
+#else
+                    throw new NotSupportedFeatureException();
+#endif
 
                 case EventType.Application_ElementTypeDuplicated:
+#if !(REVIT2013 || REVIT2014)
                     if (toggle_on)
                         uiApp.Application.ElementTypeDuplicated += hndlr.Application_ElementTypeDuplicated;
                     else
                         uiApp.Application.ElementTypeDuplicated -= hndlr.Application_ElementTypeDuplicated;
                     break;
+#else
+                    throw new NotSupportedFeatureException();
+#endif
 
                 case EventType.Application_ElementTypeDuplicating:
+#if !(REVIT2013 || REVIT2014)
                     if (toggle_on)
                         uiApp.Application.ElementTypeDuplicating += hndlr.Application_ElementTypeDuplicating;
                     else
                         uiApp.Application.ElementTypeDuplicating -= hndlr.Application_ElementTypeDuplicating;
                     break;
+#else
+                    throw new NotSupportedFeatureException();
+#endif
 
                 case EventType.Application_FailuresProcessing:
                     if (toggle_on)
@@ -441,18 +470,26 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
                     break;
 
                 case EventType.Application_FamilyLoadedIntoDocument:
+#if !(REVIT2013 || REVIT2014)
                     if (toggle_on)
                         uiApp.Application.FamilyLoadedIntoDocument += hndlr.Application_FamilyLoadedIntoDocument;
                     else
                         uiApp.Application.FamilyLoadedIntoDocument -= hndlr.Application_FamilyLoadedIntoDocument;
                     break;
+#else
+                    throw new NotSupportedFeatureException();
+#endif
 
                 case EventType.Application_FamilyLoadingIntoDocument:
+#if !(REVIT2013 || REVIT2014)
                     if (toggle_on)
                         uiApp.Application.FamilyLoadingIntoDocument += hndlr.Application_FamilyLoadingIntoDocument;
                     else
                         uiApp.Application.FamilyLoadingIntoDocument -= hndlr.Application_FamilyLoadingIntoDocument;
                     break;
+#else
+                    throw new NotSupportedFeatureException();
+#endif
 
                 case EventType.Application_FileExported:
                     if (toggle_on)
@@ -483,18 +520,26 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
                     break;
 
                 case EventType.Application_LinkedResourceOpened:
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
                     if (toggle_on)
                         uiApp.Application.LinkedResourceOpened += hndlr.Application_LinkedResourceOpened;
                     else
                         uiApp.Application.LinkedResourceOpened -= hndlr.Application_LinkedResourceOpened;
                     break;
+#else
+                    throw new NotSupportedFeatureException();
+#endif
 
                 case EventType.Application_LinkedResourceOpening:
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
                     if (toggle_on)
                         uiApp.Application.LinkedResourceOpening += hndlr.Application_LinkedResourceOpening;
                     else
                         uiApp.Application.LinkedResourceOpening -= hndlr.Application_LinkedResourceOpening;
                     break;
+#else
+                    throw new NotSupportedFeatureException();
+#endif
 
                 case EventType.Application_ProgressChanged:
                     if (toggle_on)
@@ -504,18 +549,26 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
                     break;
 
                 case EventType.Application_ViewExported:
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
                     if (toggle_on)
                         uiApp.Application.ViewExported += hndlr.Application_ViewExported;
                     else
                         uiApp.Application.ViewExported -= hndlr.Application_ViewExported;
                     break;
+#else
+                    throw new NotSupportedFeatureException();
+#endif
 
                 case EventType.Application_ViewExporting:
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
                     if (toggle_on)
                         uiApp.Application.ViewExporting += hndlr.Application_ViewExporting;
                     else
                         uiApp.Application.ViewExporting -= hndlr.Application_ViewExporting;
                     break;
+#else
+                    throw new NotSupportedFeatureException();
+#endif
 
                 case EventType.Application_ViewPrinted:
                     if (toggle_on)
@@ -532,11 +585,15 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
                     break;
 
                 case EventType.Application_WorksharedOperationProgressChanged:
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
                     if (toggle_on)
                         uiApp.Application.WorksharedOperationProgressChanged += hndlr.Application_WorksharedOperationProgressChanged;
                     else
                         uiApp.Application.WorksharedOperationProgressChanged -= hndlr.Application_WorksharedOperationProgressChanged;
                     break;
+#else
+                    throw new NotSupportedFeatureException();
+#endif
 
                 case EventType.UIApplication_ApplicationClosing:
                     if (toggle_on)
@@ -546,11 +603,15 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
                     break;
 
                 case EventType.UIApplication_DialogBoxShowing:
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016)
                     if (toggle_on)
                         uiApp.DialogBoxShowing += hndlr.UIApplication_DialogBoxShowing;
                     else
                         uiApp.DialogBoxShowing -= hndlr.UIApplication_DialogBoxShowing;
                     break;
+#else
+                    throw new NotSupportedFeatureException();
+#endif
                 case EventType.UIApplication_DisplayingOptionsDialog:
                     if (toggle_on)
                         uiApp.DisplayingOptionsDialog += hndlr.UIApplication_DisplayingOptionsDialog;
@@ -559,32 +620,48 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
                     break;
 
                 case EventType.UIApplication_DockableFrameFocusChanged:
+#if !(REVIT2013 || REVIT2014)
                     if (toggle_on)
                         uiApp.DockableFrameFocusChanged += hndlr.UIApplication_DockableFrameFocusChanged;
                     else
                         uiApp.DockableFrameFocusChanged -= hndlr.UIApplication_DockableFrameFocusChanged;
                     break;
+#else
+                    throw new NotSupportedFeatureException();
+#endif
 
                 case EventType.UIApplication_DockableFrameVisibilityChanged:
+#if !(REVIT2013 || REVIT2014)
                     if (toggle_on)
                         uiApp.DockableFrameVisibilityChanged += hndlr.UIApplication_DockableFrameVisibilityChanged;
                     else
                         uiApp.DockableFrameVisibilityChanged -= hndlr.UIApplication_DockableFrameVisibilityChanged;
                     break;
+#else
+                    throw new NotSupportedFeatureException();
+#endif
 
                 case EventType.UIApplication_FabricationPartBrowserChanged:
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016)
                     if (toggle_on)
                         uiApp.FabricationPartBrowserChanged += hndlr.UIApplication_FabricationPartBrowserChanged;
                     else
                         uiApp.FabricationPartBrowserChanged -= hndlr.UIApplication_FabricationPartBrowserChanged;
                     break;
+#else
+                    throw new NotSupportedFeatureException();
+#endif
 
                 case EventType.UIApplication_FormulaEditing:
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018)
                     if (toggle_on)
                         uiApp.FormulaEditing += hndlr.UIApplication_FormulaEditing;
                     else
                         uiApp.FormulaEditing -= hndlr.UIApplication_FormulaEditing;
                     break;
+#else
+                    throw new NotSupportedFeatureException();
+#endif
 
                 case EventType.UIApplication_Idling:
                     if (toggle_on)
@@ -595,18 +672,26 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
 
 
                 case EventType.UIApplication_TransferredProjectStandards:
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
                     if (toggle_on)
                         uiApp.TransferredProjectStandards += hndlr.UIApplication_TransferredProjectStandards;
                     else
                         uiApp.TransferredProjectStandards -= hndlr.UIApplication_TransferredProjectStandards;
                     break;
+#else
+                    throw new NotSupportedFeatureException();
+#endif
 
                 case EventType.UIApplication_TransferringProjectStandards:
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
                     if (toggle_on)
                         uiApp.TransferringProjectStandards += hndlr.UIApplication_TransferringProjectStandards;
                     else
                         uiApp.TransferringProjectStandards -= hndlr.UIApplication_TransferringProjectStandards;
                     break;
+#else
+                    throw new NotSupportedFeatureException();
+#endif
 
                 case EventType.UIApplication_ViewActivated:
                     if (toggle_on)
@@ -622,6 +707,7 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
                         uiApp.ViewActivating -= hndlr.UIApplication_ViewActivating;
                     break;
 
+#if !(REVIT2013)
                 case EventType.AddInCommandBinding_BeforeExecuted:
                     if (eventTarget == null) {
                         // activate before existing handler on ALL known commands
@@ -639,6 +725,9 @@ public static void ToggleHooks<T>(T hndlr, UIApplication uiApp, EventType eventT
                             cmdBinding.BeforeExecuted -= hndlr.AddInCommandBinding_BeforeExecuted;
                     }
                     break;
+#else
+                    throw new NotSupportedFeatureException();
+#endif
 
                 case EventType.AddInCommandBinding_CanExecute:
                     if (eventTarget != null) {
@@ -707,7 +796,12 @@ public class UIAppEventUtils {
         public static Visual GetWindowRoot(UIApplication uiapp) {
             IntPtr wndHndle = IntPtr.Zero;
             try {
+#if (REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018)
+                wndHndle = Autodesk.Windows.ComponentManager.ApplicationWindow;
+#else
                 wndHndle = uiapp.MainWindowHandle;
+#endif
+
             }
             catch { }
 
@@ -736,7 +830,11 @@ private static void OnDocumentChanged(object sender, DocumentChangedEventArgs e)
 
         private static void CancelAllDialogs(object sender, DialogBoxShowingEventArgs e) {
             if (e.Cancellable) {
+#if (REVIT2013 || REVIT2014)
+                e.Cancel = true;
+#else
                 e.Cancel();
+#endif
             }
             else
                 e.OverrideResult(1);
@@ -803,6 +901,7 @@ private static void PostElementPropertyUpdateRequest(Document doc, string txnNam
             _uiApp.Idling += NewElementPropertyValueUpdater;
         }
 
+#if !(REVIT2013)
         public static void PostCommandAndUpdateNewElementProperties(UIApplication uiapp, Document doc, PostableCommand postableCommand, string transactionName, BuiltInParameter bip, string value) {
             Init();
 
@@ -815,12 +914,16 @@ public static void PostCommandAndUpdateNewElementProperties(UIApplication uiapp,
 
             PostElementPropertyUpdateRequest(doc, transactionName, bip, value);
         }
+#endif
     }
 
     public class PlaceKeynoteExternalEventHandler : IExternalEventHandler {
         public string KeynoteKey = null;
+#if !(REVIT2013)
         public PostableCommand KeynoteType = PostableCommand.UserKeynote;
+#endif
         public void Execute(UIApplication uiApp) {
+#if !(REVIT2013)
             DocumentEventUtils.PostCommandAndUpdateNewElementProperties(
                 uiApp,
                 uiApp.ActiveUIDocument.Document,
@@ -829,6 +932,9 @@ public void Execute(UIApplication uiApp) {
                 BuiltInParameter.KEY_VALUE,
                 KeynoteKey
                 );
+#else
+            throw new NotSupportedFeatureException();
+#endif
         }
 
         public string GetName() {
@@ -1165,6 +1271,7 @@ public List<TabColoringRule> TabFilterRules {
 
         public List<RuleSlot> StyledDocuments => _ruleSlots.ToList();
 
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018)
         static string GetTabUniqueId(TabItem tab) {
             return $"{((LayoutDocument)tab.Header).Title}+{tab.GetHashCode()}+{tab.IsSelected}";
         }
@@ -1310,6 +1417,7 @@ void Set(TabItem tab, long docId, bool isFamilyTab) {
                 }
             }
         }
+#endif
 
         public void ClearTheme(UIApplication uiApp, IEnumerable<TabItem> docTabs) {
             foreach (TabItem tab in docTabs)
@@ -1366,6 +1474,7 @@ public static TabColoringTheme TabColoringTheme {
             }
         }
 
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018)
         public static Xceed.Wpf.AvalonDock.DockingManager GetDockingManager(UIApplication uiapp) {
             var wndRoot = (MainWindow)UIAppEventUtils.GetWindowRoot(uiapp);
             if (wndRoot != null) {
@@ -1473,6 +1582,7 @@ static void UpdateDocumentTabGroups() {
                 }
             }
         }
+#endif
     }
 
     public static class RibbonEventUtils {
diff --git a/dev/pyRevitLabs.PyRevit.Runtime/EventHooks.cs b/dev/pyRevitLabs.PyRevit.Runtime/EventHooks.cs
index a2b46e6406..b2933fccd4 100644
--- a/dev/pyRevitLabs.PyRevit.Runtime/EventHooks.cs
+++ b/dev/pyRevitLabs.PyRevit.Runtime/EventHooks.cs
@@ -213,6 +213,7 @@ public void UIApplication_ViewActivated(object sender, Autodesk.Revit.UI.Events.
             ExecuteEventHooks(EventType.UIApplication_ViewActivated, sender, e);
         }
 
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
         public void UIApplication_TransferringProjectStandards(object sender, Autodesk.Revit.UI.Events.TransferringProjectStandardsEventArgs e) {
             ExecuteEventHooks(EventType.UIApplication_TransferringProjectStandards, sender, e);
         }
@@ -220,19 +221,25 @@ public void UIApplication_TransferringProjectStandards(object sender, Autodesk.R
         public void UIApplication_TransferredProjectStandards(object sender, Autodesk.Revit.UI.Events.TransferredProjectStandardsEventArgs e) {
             ExecuteEventHooks(EventType.UIApplication_TransferredProjectStandards, sender, e);
         }
+#endif
 
         public void UIApplication_Idling(object sender, Autodesk.Revit.UI.Events.IdlingEventArgs e) {
             ExecuteEventHooks(EventType.UIApplication_Idling, sender, e);
         }
 
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018)
         public void UIApplication_FormulaEditing(object sender, Autodesk.Revit.UI.Events.FormulaEditingEventArgs e) {
             ExecuteEventHooks(EventType.UIApplication_FormulaEditing, sender, e);
         }
+#endif
 
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016)
         public void UIApplication_FabricationPartBrowserChanged(object sender, Autodesk.Revit.UI.Events.FabricationPartBrowserChangedEventArgs e) {
             ExecuteEventHooks(EventType.UIApplication_FabricationPartBrowserChanged, sender, e);
         }
+#endif
 
+#if !(REVIT2013 || REVIT2014)
         public void UIApplication_DockableFrameVisibilityChanged(object sender, Autodesk.Revit.UI.Events.DockableFrameVisibilityChangedEventArgs e) {
             ExecuteEventHooks(EventType.UIApplication_DockableFrameVisibilityChanged, sender, e);
         }
@@ -240,6 +247,7 @@ public void UIApplication_DockableFrameVisibilityChanged(object sender, Autodesk
         public void UIApplication_DockableFrameFocusChanged(object sender, Autodesk.Revit.UI.Events.DockableFrameFocusChangedEventArgs e) {
             ExecuteEventHooks(EventType.UIApplication_DockableFrameFocusChanged, sender, e);
         }
+#endif
 
         public void UIApplication_DisplayingOptionsDialog(object sender, Autodesk.Revit.UI.Events.DisplayingOptionsDialogEventArgs e) {
             ExecuteEventHooks(EventType.UIApplication_DisplayingOptionsDialog, sender, e);
@@ -253,9 +261,11 @@ public void UIApplication_ApplicationClosing(object sender, Autodesk.Revit.UI.Ev
             ExecuteEventHooks(EventType.UIApplication_ApplicationClosing, sender, e);
         }
 
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
         public void Application_WorksharedOperationProgressChanged(object sender, Autodesk.Revit.DB.Events.WorksharedOperationProgressChangedEventArgs e) {
             ExecuteEventHooks(EventType.Application_WorksharedOperationProgressChanged, sender, e);
         }
+#endif
         public void Application_ViewPrinting(object sender, Autodesk.Revit.DB.Events.ViewPrintingEventArgs e) {
             ExecuteEventHooks(EventType.Application_ViewPrinting, sender, e);
         }
@@ -264,6 +274,7 @@ public void Application_ViewPrinted(object sender, Autodesk.Revit.DB.Events.View
             ExecuteEventHooks(EventType.Application_ViewPrinted, sender, e);
         }
 
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
         public void Application_ViewExporting(object sender, Autodesk.Revit.DB.Events.ViewExportingEventArgs e) {
             ExecuteEventHooks(EventType.Application_ViewExporting, sender, e);
         }
@@ -271,10 +282,12 @@ public void Application_ViewExporting(object sender, Autodesk.Revit.DB.Events.Vi
         public void Application_ViewExported(object sender, Autodesk.Revit.DB.Events.ViewExportedEventArgs e) {
             ExecuteEventHooks(EventType.Application_ViewExported, sender, e);
         }
+#endif
         public void Application_ProgressChanged(object sender, Autodesk.Revit.DB.Events.ProgressChangedEventArgs e) {
             ExecuteEventHooks(EventType.Application_ProgressChanged, sender, e);
         }
 
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
         public void Application_LinkedResourceOpening(object sender, Autodesk.Revit.DB.Events.LinkedResourceOpeningEventArgs e) {
             ExecuteEventHooks(EventType.Application_LinkedResourceOpening, sender, e);
         }
@@ -282,6 +295,7 @@ public void Application_LinkedResourceOpening(object sender, Autodesk.Revit.DB.E
         public void Application_LinkedResourceOpened(object sender, Autodesk.Revit.DB.Events.LinkedResourceOpenedEventArgs e) {
             ExecuteEventHooks(EventType.Application_LinkedResourceOpened, sender, e);
         }
+#endif
 
         public void Application_FileImporting(object sender, Autodesk.Revit.DB.Events.FileImportingEventArgs e) {
             ExecuteEventHooks(EventType.Application_FileImporting, sender, e);
@@ -299,6 +313,7 @@ public void Application_FileExported(object sender, Autodesk.Revit.DB.Events.Fil
             ExecuteEventHooks(EventType.Application_FileExported, sender, e);
         }
 
+#if !(REVIT2013 || REVIT2014)
         public void Application_FamilyLoadingIntoDocument(object sender, Autodesk.Revit.DB.Events.FamilyLoadingIntoDocumentEventArgs e) {
             ExecuteEventHooks(EventType.Application_FamilyLoadingIntoDocument, sender, e);
         }
@@ -306,11 +321,13 @@ public void Application_FamilyLoadingIntoDocument(object sender, Autodesk.Revit.
         public void Application_FamilyLoadedIntoDocument(object sender, Autodesk.Revit.DB.Events.FamilyLoadedIntoDocumentEventArgs e) {
             ExecuteEventHooks(EventType.Application_FamilyLoadedIntoDocument, sender, e);
         }
+#endif
 
         public void Application_FailuresProcessing(object sender, Autodesk.Revit.DB.Events.FailuresProcessingEventArgs e) {
             ExecuteEventHooks(EventType.Application_FailuresProcessing, sender, e);
         }
 
+#if !(REVIT2013 || REVIT2014)
         public void Application_ElementTypeDuplicating(object sender, Autodesk.Revit.DB.Events.ElementTypeDuplicatingEventArgs e) {
             ExecuteEventHooks(EventType.Application_ElementTypeDuplicating, sender, e);
         }
@@ -321,6 +338,7 @@ public void Application_ElementTypeDuplicated(object sender, Autodesk.Revit.DB.E
         public void Application_DocumentWorksharingEnabled(object sender, Autodesk.Revit.DB.Events.DocumentWorksharingEnabledEventArgs e) {
             ExecuteEventHooks(EventType.Application_DocumentWorksharingEnabled, sender, e);
         }
+#endif
 
         public void Application_DocumentSynchronizingWithCentral(object sender, Autodesk.Revit.DB.Events.DocumentSynchronizingWithCentralEventArgs e) {
             ExecuteEventHooks(EventType.Application_DocumentSynchronizingWithCentral, sender, e);
@@ -386,9 +404,11 @@ public void Application_ApplicationInitialized(object sender, Autodesk.Revit.DB.
             ExecuteEventHooks(EventType.Application_ApplicationInitialized, sender, e);
         }
 
+#if !(REVIT2013)
         public void AddInCommandBinding_BeforeExecuted(object sender, BeforeExecutedEventArgs e) {
             ExecuteEventHooks(EventType.AddInCommandBinding_BeforeExecuted, sender, e, e.CommandId.Name);
         }
+#endif
 
         public void AddInCommandBinding_CanExecute(object sender, CanExecuteEventArgs e) {
             ExecuteEventHooks(EventType.AddInCommandBinding_CanExecute, sender, e, e.CommandId.Name);
diff --git a/dev/pyRevitLabs.PyRevit.Runtime/EventTelemetry.cs b/dev/pyRevitLabs.PyRevit.Runtime/EventTelemetry.cs
index d167dbce83..b9885802a7 100644
--- a/dev/pyRevitLabs.PyRevit.Runtime/EventTelemetry.cs
+++ b/dev/pyRevitLabs.PyRevit.Runtime/EventTelemetry.cs
@@ -162,9 +162,17 @@ public static Dictionary<string, object> GetPrintSettings(PrintParameters printP
                     { "hide_cropbounds", printParams.HideCropBoundaries },
                     { "hide_refplanes", printParams.HideReforWorkPlanes },
                     { "hide_scopeboxes", printParams.HideScopeBoxes },
+#if !(REVIT2013)
                     { "hide_unref_viewtags", printParams.HideUnreferencedViewTags },
+#else
+                    { "hide_unref_viewtags", null },
+#endif
                     { "margin_type", printParams.MarginType.ToString() },
+#if !(REVIT2013 || REVIT2014)
                     { "mask_lines", printParams.MaskCoincidentLines },
+#else
+                    { "mask_lines", null },
+#endif
                     { "page_orientation", printParams.PageOrientation.ToString() },
                     { "paper_placement", printParams.PaperPlacement.ToString() },
                     { "paper_size", printParams.PaperSize.Name },
@@ -202,7 +210,7 @@ public static Dictionary<string, object> GetProjectInfo(Document doc) {
 
                 var docProjProps = new Dictionary<string, object>();
                 foreach (Parameter param in pinfo.Parameters)
-#if !(REVIT2021 || REVIT2022 || REVIT2023)
+#if !(REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020 || REVIT2021 || REVIT2022 || REVIT2023)
                     if (param.Id.Value > 0)
 #else
                     if (param.Id.IntegerValue > 0)
@@ -329,6 +337,7 @@ public void UIApplication_ViewActivated(object sender, Autodesk.Revit.UI.Events.
             }, sender, e);
         }
 
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
         public void UIApplication_TransferringProjectStandards(object sender, Autodesk.Revit.UI.Events.TransferringProjectStandardsEventArgs e) {
             var extItems = new Dictionary<string, string>();
             foreach (var kvpair in e.GetExternalItems())
@@ -378,6 +387,7 @@ public void UIApplication_TransferredProjectStandards(object sender, Autodesk.Re
                 }
             }, sender, e);
         }
+#endif
 
         public void UIApplication_Idling(object sender, Autodesk.Revit.UI.Events.IdlingEventArgs e) {
             LogEventTelemetryRecord(new EventTelemetryRecord {
@@ -385,9 +395,10 @@ public void UIApplication_Idling(object sender, Autodesk.Revit.UI.Events.IdlingE
             }, sender, e);
         }
 
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018)
         public void UIApplication_FormulaEditing(object sender, Autodesk.Revit.UI.Events.FormulaEditingEventArgs e) {
             var paramId = e.ParameterId;
-#if !(REVIT2021 || REVIT2022 || REVIT2023)
+#if !(REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020 || REVIT2021 || REVIT2022 || REVIT2023)
             long paramIdInt = 0;
 #else
             int paramIdInt = 0;
@@ -396,7 +407,7 @@ public void UIApplication_FormulaEditing(object sender, Autodesk.Revit.UI.Events
             Element param = null;
             if (paramId != null && paramId != ElementId.InvalidElementId) {
                 param = e.CurrentDocument != null ? e.CurrentDocument.GetElement(paramId) : param;
-#if !(REVIT2021 || REVIT2022 || REVIT2023)
+#if !(REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020 || REVIT2021 || REVIT2022 || REVIT2023)
                 paramIdInt = paramId.Value;
 #else
                 paramIdInt = paramId.IntegerValue;
@@ -416,7 +427,9 @@ public void UIApplication_FormulaEditing(object sender, Autodesk.Revit.UI.Events
                 }
             }, sender, e);
         }
+#endif
 
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016)
             public void UIApplication_FabricationPartBrowserChanged(object sender, Autodesk.Revit.UI.Events.FabricationPartBrowserChangedEventArgs e) {
             // TODO: implement
             //e.GetAllSolutionsPartsTypeCounts
@@ -433,7 +446,9 @@ public void UIApplication_FabricationPartBrowserChanged(object sender, Autodesk.
                 }
             }, sender, e);
         }
+#endif
 
+#if !(REVIT2013 || REVIT2014)
         public void UIApplication_DockableFrameVisibilityChanged(object sender, Autodesk.Revit.UI.Events.DockableFrameVisibilityChangedEventArgs e) {
             LogEventTelemetryRecord(new EventTelemetryRecord {
                 type = EventUtils.GetEventName(EventType.UIApplication_DockableFrameVisibilityChanged),
@@ -453,6 +468,7 @@ public void UIApplication_DockableFrameFocusChanged(object sender, Autodesk.Revi
                 }
             }, sender, e);
         }
+#endif
 
         public void UIApplication_DisplayingOptionsDialog(object sender, Autodesk.Revit.UI.Events.DisplayingOptionsDialogEventArgs e) {
             LogEventTelemetryRecord(new EventTelemetryRecord {
@@ -467,7 +483,11 @@ public void UIApplication_DialogBoxShowing(object sender, Autodesk.Revit.UI.Even
             LogEventTelemetryRecord(new EventTelemetryRecord {
                 type = EventUtils.GetEventName(EventType.UIApplication_DialogBoxShowing),
                 args = new Dictionary<string, object> {
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016)
                     { "dialog_id", e.DialogId },
+#else
+                    { "dialog_id", null },
+#endif
                 }
             }, sender, e);
         }
@@ -478,6 +498,7 @@ public void UIApplication_ApplicationClosing(object sender, Autodesk.Revit.UI.Ev
             }, sender, e);
         }
 
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
         public void Application_WorksharedOperationProgressChanged(object sender, WorksharedOperationProgressChangedEventArgs e) {
             LogEventTelemetryRecord(new EventTelemetryRecord {
                 type = EventUtils.GetEventName(EventType.Application_WorksharedOperationProgressChanged),
@@ -485,6 +506,7 @@ public void Application_WorksharedOperationProgressChanged(object sender, Worksh
                 status = e.Status.ToString(),
             }, sender, e);
         }
+#endif
 
         public void Application_ViewPrinting(object sender, ViewPrintingEventArgs e) {
             var views = new List<Element>() { e.View };
@@ -498,7 +520,11 @@ public void Application_ViewPrinting(object sender, ViewPrintingEventArgs e) {
                     { "view", GetViewsData(views) },
                     { "view_index", e.Index },
                     { "total_views", e.TotalViews },
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016)
                     { "settings", GetPrintSettings(e.GetSettings().PrintParameters) },
+#else
+                    { "settings", null },
+#endif
                 }
             }, sender, e);
         }
@@ -520,6 +546,7 @@ public void Application_ViewPrinted(object sender, ViewPrintedEventArgs e) {
             }, sender, e);
         }
 
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
         public void Application_ViewExporting(object sender, ViewExportingEventArgs e) {
             var views = new List<Element>();
             if (e.Document != null)
@@ -554,6 +581,7 @@ public void Application_ViewExported(object sender, ViewExportedEventArgs e) {
                 }
             }, sender, e);
         }
+#endif
 
         public void Application_ProgressChanged(object sender, ProgressChangedEventArgs e) {
             LogEventTelemetryRecord(new EventTelemetryRecord {
@@ -568,6 +596,7 @@ public void Application_ProgressChanged(object sender, ProgressChangedEventArgs
             }, sender, e);
         }
 
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017)
         public void Application_LinkedResourceOpening(object sender, LinkedResourceOpeningEventArgs e) {
             LogEventTelemetryRecord(new EventTelemetryRecord {
                 type = EventUtils.GetEventName(EventType.Application_LinkedResourceOpening),
@@ -592,6 +621,7 @@ public void Application_LinkedResourceOpened(object sender, LinkedResourceOpened
                 }
             }, sender, e);
         }
+#endif
 
         public void Application_FileImporting(object sender, FileImportingEventArgs e) {
             LogEventTelemetryRecord(new EventTelemetryRecord {
@@ -651,6 +681,7 @@ public void Application_FileExported(object sender, FileExportedEventArgs e) {
             }, sender, e);
         }
 
+#if !(REVIT2013 || REVIT2014)
         public void Application_FamilyLoadingIntoDocument(object sender, FamilyLoadingIntoDocumentEventArgs e) {
             LogEventTelemetryRecord(new EventTelemetryRecord {
                 type = EventUtils.GetEventName(EventType.Application_FamilyLoadingIntoDocument),
@@ -703,6 +734,7 @@ public void Application_FamilyLoadedIntoDocument(object sender, FamilyLoadedInto
                 }
             }, sender, e);
         }
+#endif
 
         public void Application_FailuresProcessing(object sender, FailuresProcessingEventArgs e) {
             Document doc = null;
@@ -757,6 +789,7 @@ public void Application_FailuresProcessing(object sender, FailuresProcessingEven
             }, sender, e);
         }
 
+#if !(REVIT2013 || REVIT2014)
         public void Application_ElementTypeDuplicating(object sender, ElementTypeDuplicatingEventArgs e) {
             var doc = e.Document;
             string typeCategory = string.Empty;
@@ -809,7 +842,7 @@ public void Application_ElementTypeDuplicated(object sender, ElementTypeDuplicat
                     { "category", typeCategory },
                     { "from_typename", origTypeName },
                     { "to_typename", e.NewName },
-#if !(REVIT2021 || REVIT2022 || REVIT2023)
+#if !(REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020 || REVIT2021 || REVIT2022 || REVIT2023)
                     { "to_typeid", e.NewElementTypeId.Value },
 #else
                     { "to_typeid", e.NewElementTypeId.IntegerValue },
@@ -828,6 +861,7 @@ public void Application_DocumentWorksharingEnabled(object sender, DocumentWorksh
                 projectname = GetProjectName(doc),
             }, sender, e);
         }
+#endif
 
         public void Application_DocumentSynchronizingWithCentral(object sender, DocumentSynchronizingWithCentralEventArgs e) {
             var syncOpts = e.Options;
@@ -841,15 +875,25 @@ public void Application_DocumentSynchronizingWithCentral(object sender, Document
                     { "comments", e.Comments },
                     { "location", e.Location },
                     { "options", new Dictionary<string,object> {
+#if !(REVIT2013)
                         { "comment", syncOpts.Comment },
                         { "compact", syncOpts.Compact },
+#else
+                        { "comment", null },
+                        { "compact", null },
+#endif
                         { "relinquish_borrowed", syncOpts.RelinquishBorrowedElements },
                         { "relinquish_family_worksets", syncOpts.RelinquishFamilyWorksets },
                         { "relinquish_projectstd_worksets", syncOpts.RelinquishProjectStandardWorksets },
                         { "relinquish_user_worksets", syncOpts.RelinquishUserCreatedWorksets },
                         { "relinquish_view_worksets", syncOpts.RelinquishViewWorksets },
+#if !(REVIT2013)
                         { "save_local_after", syncOpts.SaveLocalAfter },
                         { "save_local_before", syncOpts.SaveLocalBefore },
+#else
+                        { "save_local_after", null },
+                        { "save_local_before", null },
+#endif
                     } },
                 }
             }, sender, e);
@@ -876,7 +920,12 @@ public void Application_DocumentSavingAs(object sender, DocumentSavingAsEventArg
                 projectnum = GetProjectNumber(e.Document),
                 projectname = GetProjectName(e.Document),
                 args = new Dictionary<string, object> {
+#if (REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020 || REVIT2021_0)
+                    { "as_master_file", e.IsSavingAsMasterFile },
+#else
+                    // this change was made in Revit 2021.1
                     { "as_master_file", e.IsSavingAsCentralFile },
+#endif
                     { "path", e.PathName },
                 }
             }, sender, e);
@@ -891,7 +940,12 @@ public void Application_DocumentSavedAs(object sender, DocumentSavedAsEventArgs
                 projectname = GetProjectName(e.Document),
                 status = e.Status.ToString(),
                 args = new Dictionary<string, object> {
+#if (REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020 || REVIT2021_0)
+                    { "as_master_file", e.IsSavingAsMasterFile },
+#else
+                    // this change was made in Revit 2021.1
                     { "as_master_file", e.IsSavingAsCentralFile },
+#endif
                     { "original_path",  e.OriginalPath },
                     { "project_info", GetProjectInfo(e.Document) }
                 }
@@ -931,7 +985,11 @@ public void Application_DocumentPrinting(object sender, DocumentPrintingEventArg
                 projectname = GetProjectName(e.Document),
                 args = new Dictionary<string, object> {
                 { "views", GetViewsData(GetElements(e.Document, e.GetViewElementIds())) },
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016)
                 { "settings", GetPrintSettings(e.GetSettings().PrintParameters) },
+#else
+                { "settings", null },
+#endif
                 }
             }, sender, e);
         }
@@ -1038,6 +1096,7 @@ public void Application_ApplicationInitialized(object sender, ApplicationInitial
             }, sender, e);
         }
 
+#if !(REVIT2013)
         public void AddInCommandBinding_BeforeExecuted(object sender, BeforeExecutedEventArgs e) {
             var doc = e.ActiveDocument;
             LogEventTelemetryRecord(new EventTelemetryRecord {
@@ -1051,6 +1110,7 @@ public void AddInCommandBinding_BeforeExecuted(object sender, BeforeExecutedEven
                 }
             }, sender, e);
         }
+#endif
 
         public void AddInCommandBinding_CanExecute(object sender, CanExecuteEventArgs e) {
             // do nothing. no interesting telemetry data
diff --git a/dev/pyRevitLabs.PyRevit.Runtime/GrasshopperEngine.cs b/dev/pyRevitLabs.PyRevit.Runtime/GrasshopperEngine.cs
index 15dbe821c2..9081e2b5ff 100644
--- a/dev/pyRevitLabs.PyRevit.Runtime/GrasshopperEngine.cs
+++ b/dev/pyRevitLabs.PyRevit.Runtime/GrasshopperEngine.cs
@@ -28,8 +28,13 @@ public override int Execute(ref ScriptRuntime runtime) {
                     if (methodInfo.Name == "Execute" && methodParams.Count() == 5) {
 
                         View activeView = null;
+#if !(REVIT2013 || REVIT2014)
                         if (runtime.UIApp != null && runtime.UIApp.ActiveUIDocument != null)
                             activeView = runtime.UIApp.ActiveUIDocument.ActiveGraphicalView;
+#else
+                        if (runtime.UIApp != null && runtime.UIApp.ActiveUIDocument != null)
+                            activeView = runtime.UIApp.ActiveUIDocument.ActiveView;
+#endif
 
                         // run the script
                         if (runtime.UIApp != null) {
diff --git a/dev/pyRevitLabs.PyRevit.Runtime/ScriptCommands.cs b/dev/pyRevitLabs.PyRevit.Runtime/ScriptCommands.cs
index d6b0730733..f225e3125f 100644
--- a/dev/pyRevitLabs.PyRevit.Runtime/ScriptCommands.cs
+++ b/dev/pyRevitLabs.PyRevit.Runtime/ScriptCommands.cs
@@ -566,9 +566,13 @@ public override bool IsMatch(UIApplication uiApp, CategorySet selectedCategories
                                 return false;
                             break;
                         case DocumentType.CloudProject:
+#if !(REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018 || (REVIT2019 && !REVIT2019_1) )
                             if (uiApp.ActiveUIDocument.Document.IsFamilyDocument || !uiApp.ActiveUIDocument.Document.IsModelInCloud)
                                 return false;
                             break;
+#else
+                            return false;
+#endif
                         case DocumentType.Family:
                             if (!uiApp.ActiveUIDocument.Document.IsFamilyDocument)
                                 return false;
@@ -609,7 +613,11 @@ public override bool IsMatch(UIApplication uiApp, CategorySet selectedCategories
                     // check active views
                     if (_viewTypes.Count > 0) {
                         if (HasDocument(uiApp))
+#if (REVIT2013 || REVIT2014)
+                            return _viewTypes.Contains(uiApp.ActiveUIDocument.ActiveView.ViewType);
+#else
                             return _viewTypes.Contains(uiApp.ActiveUIDocument.ActiveGraphicalView.ViewType);
+#endif
                     }
                     else
                         return true;
@@ -652,7 +660,7 @@ public override bool IsMatch(UIApplication uiApp, CategorySet selectedCategories
                     try {
                         foreach (Category category in selectedCategories)
                         {
-#if !(REVIT2021 || REVIT2022 || REVIT2023)
+#if !(REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020 || REVIT2021 || REVIT2022 || REVIT2023)
                             if (category.Id.Value == _categoryId)
 #else
                             if (category.Id.IntegerValue == _categoryId)
@@ -668,7 +676,7 @@ public override bool IsMatch(UIApplication uiApp, CategorySet selectedCategories
 
             public override bool IsMatch(Category category) {
                 try {
-#if !(REVIT2021 || REVIT2022 || REVIT2023)
+#if !(REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020 || REVIT2021 || REVIT2022 || REVIT2023)
                     return category.Id.Value == _categoryId;
 #else
                     return category.Id.IntegerValue == _categoryId;
diff --git a/dev/pyRevitLabs.PyRevit.Runtime/ScriptConsoleUtils.cs b/dev/pyRevitLabs.PyRevit.Runtime/ScriptConsoleUtils.cs
index b1e7424847..a29bcb1d26 100644
--- a/dev/pyRevitLabs.PyRevit.Runtime/ScriptConsoleUtils.cs
+++ b/dev/pyRevitLabs.PyRevit.Runtime/ScriptConsoleUtils.cs
@@ -5,6 +5,10 @@
 using Autodesk.Revit.DB;
 using Autodesk.Revit.UI;
 
+#if (REVIT2013 || REVIT2014)
+using Autodesk.Revit.UI.Selection;
+#endif
+
 namespace PyRevitLabs.PyRevit.Runtime {
     public class ScriptConsoleUtils {
         public static void ProcessUrl(UIApplication uiApp, string inputUrl, ScriptConsole output = null) {
@@ -17,7 +21,7 @@ public static void ProcessUrl(UIApplication uiApp, string inputUrl, ScriptConsol
             if (parsedQuery["command"] == "select" && parsedQuery["element[]"] != null) {
                 var idList = new List<ElementId>();
                 foreach (string strId in parsedQuery["element[]"].Split(',')) {
-#if !(REVIT2021 || REVIT2022 || REVIT2023)
+#if !(REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020 || REVIT2021 || REVIT2022 || REVIT2023)
                     idList.Add(new ElementId(Convert.ToInt64(strId)));
 #else
                     idList.Add(new ElementId(Convert.ToInt32(strId)));
@@ -128,7 +132,18 @@ public static void SelectElements(UIApplication uiApp, List<ElementId> elementId
 
                 // now select the element(s)
 
+#if (REVIT2013 || REVIT2014)
+                var elementSet = SelElementSet.Create();
+                foreach (ElementId elId in validElementIds) {
+                    var element = doc.GetElement(elId);
+                    if (element != null)
+                        elementSet.Add(element);
+                }
+
+                uidoc.Selection.Elements = elementSet;
+#else
                 uidoc.Selection.SetElementIds(validElementIds);
+#endif
 
             }
 
diff --git a/dev/pyRevitLabs.PyRevit.Runtime/telemetry.cs b/dev/pyRevitLabs.PyRevit.Runtime/telemetry.cs
index 612d7bb1da..779341ef41 100644
--- a/dev/pyRevitLabs.PyRevit.Runtime/telemetry.cs
+++ b/dev/pyRevitLabs.PyRevit.Runtime/telemetry.cs
@@ -35,7 +35,9 @@ public TelemetryRecord() {
     }
 
     public static class Telemetry {
-        private static string _exeBuild = null;
+#if REVIT2021_OR_GREATER
+        private static string _exeBuild = null;  
+#endif
 
 
         public static string DefaultUser { get; set; } = string.Empty;
@@ -125,6 +127,22 @@ public static string GetRevitBuild(object source) {
             // determine build number
             string revitbuild = string.Empty;
 
+#if (REVIT2013 || REVIT2014 || REVIT2015 || REVIT2016 || REVIT2017 || REVIT2018 || REVIT2019 || REVIT2020)
+            switch (source) {
+                case UIControlledApplication uictrlapp:
+                    revitbuild = uictrlapp.ControlledApplication.VersionBuild;
+                    break;
+                case UIApplication uiapp:
+                    revitbuild = uiapp.Application.VersionBuild;
+                    break;
+                case ControlledApplication ctrlapp:
+                    revitbuild = ctrlapp.VersionBuild;
+                    break;
+                case Application app:
+                    revitbuild = app.VersionBuild;
+                    break;
+            }
+#else
             // Revit 2021 has a bug on .VersionBuild
             // it reports identical value as .VersionNumber
             // let's give a invalid, but correctly formatted value to the telemetry server
@@ -140,6 +158,7 @@ public static string GetRevitBuild(object source) {
             }
             else
                 revitbuild = _exeBuild;
+#endif
             return revitbuild;
         }
     }
diff --git a/dev/pyRevitLoader/pyRevitAssemblyBuilder/SessionManager/RevitThemeDetector.cs b/dev/pyRevitLoader/pyRevitAssemblyBuilder/SessionManager/RevitThemeDetector.cs
index eb80aa7ea8..152154613f 100644
--- a/dev/pyRevitLoader/pyRevitAssemblyBuilder/SessionManager/RevitThemeDetector.cs
+++ b/dev/pyRevitLoader/pyRevitAssemblyBuilder/SessionManager/RevitThemeDetector.cs
@@ -28,7 +28,7 @@ public bool IsDarkTheme()
                 
             try
             {
-#if (REVIT2021 || REVIT2022 || REVIT2023)
+#if (REVIT2019 || REVIT2020 || REVIT2021 || REVIT2022 || REVIT2023)
                 // UIThemeManager not available before Revit 2024
                 _cachedTheme = false;
                 _themeDetected = true;

From 0129345085742b222b2b203f790fd3aaadad4b64 Mon Sep 17 00:00:00 2001
From: Roman Golev <67314258+romangolev@users.noreply.github.com>
Date: Tue, 25 Aug 2026 11:30:50 +0200
Subject: [PATCH 6/6] Revert "refactor(loader): drop legacy UIApplication field
 fallback"

This reverts commit e490d31448a8c3bd6639b215ec526ecfebfdde78.
---
 dev/pyRevitLoader/Source/PyRevitLoaderApplication.cs | 11 +++++++----
 .../SessionManager/Constants.cs                      | 12 +++++++++++-
 2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/dev/pyRevitLoader/Source/PyRevitLoaderApplication.cs b/dev/pyRevitLoader/Source/PyRevitLoaderApplication.cs
index 74b12dd783..83d154ea71 100644
--- a/dev/pyRevitLoader/Source/PyRevitLoaderApplication.cs
+++ b/dev/pyRevitLoader/Source/PyRevitLoaderApplication.cs
@@ -48,14 +48,17 @@ class PyRevitLoaderApplication : IExternalApplication
 
 		private static UIApplication GetUIApplication(UIControlledApplication application)
 		{
-			var fi = application.GetType().GetField(
-				RevitApiConstants.MODERN_UIAPP_FIELD, BindingFlags.NonPublic | BindingFlags.Instance);
+			var versionNumber = application.ControlledApplication.VersionNumber;
+			var fieldName = int.Parse(versionNumber) >= RevitApiConstants.NEW_UIAPP_FIELD_VERSION 
+				? RevitApiConstants.MODERN_UIAPP_FIELD 
+				: RevitApiConstants.LEGACY_UIAPP_FIELD;
+			var fi = application.GetType().GetField(fieldName, BindingFlags.NonPublic | BindingFlags.Instance);
 
 			if (fi == null)
 			{
 				throw new InvalidOperationException(
-					$"Could not find field '{RevitApiConstants.MODERN_UIAPP_FIELD}' on type " +
-					$"'{application.GetType().FullName}'. The Revit API internal implementation may have changed in this version.");
+					$"Could not find field '{fieldName}' on type '{application.GetType().FullName}'. " +
+					"The Revit API internal implementation may have changed in this version.");
 			}
 
 			return (UIApplication)fi.GetValue(application);
diff --git a/dev/pyRevitLoader/pyRevitAssemblyBuilder/SessionManager/Constants.cs b/dev/pyRevitLoader/pyRevitAssemblyBuilder/SessionManager/Constants.cs
index cdde3223a1..d520c2a4f0 100644
--- a/dev/pyRevitLoader/pyRevitAssemblyBuilder/SessionManager/Constants.cs
+++ b/dev/pyRevitLoader/pyRevitAssemblyBuilder/SessionManager/Constants.cs
@@ -68,8 +68,18 @@ internal static class ExtensionConstants
     public static class RevitApiConstants
     {
         /// <summary>
-        /// Field name for UIApplication on UIControlledApplication.
+        /// Revit version where the UIApplication field name changed.
+        /// </summary>
+        public const int NEW_UIAPP_FIELD_VERSION = 2017;
+
+        /// <summary>
+        /// Field name for UIApplication in Revit 2017 and newer.
         /// </summary>
         public const string MODERN_UIAPP_FIELD = "m_uiapplication";
+
+        /// <summary>
+        /// Field name for UIApplication in Revit versions before 2017.
+        /// </summary>
+        public const string LEGACY_UIAPP_FIELD = "m_application";
     }
 }