4 files changed, 27 insertions, 18 deletions

diff --git a/release/scripts/startup/bl_ui/space_text.py b/release/scripts/startup/bl_ui/space_text.py
index 93ab12e8462..811e7fd41c5 100644
--- a/release/scripts/startup/bl_ui/space_text.py
+++ b/release/scripts/startup/bl_ui/space_text.py
@@ -268,10 +268,7 @@ class TEXT_MT_text(Menu):
                 layout.operator("text.make_internal")
 
             layout.separator()
-            row = layout.row()
-            row.active = text.name.endswith(".py")
-            row.prop(text, "use_module")
-            row = layout.row()
+            layout.prop(text, "use_module")
 
             layout.prop(st, "use_live_edit")
 
diff --git a/source/blender/blenkernel/BKE_blender_version.h b/source/blender/blenkernel/BKE_blender_version.h
index 5ef56fab9cb..4ed4225c836 100644
--- a/source/blender/blenkernel/BKE_blender_version.h
+++ b/source/blender/blenkernel/BKE_blender_version.h
@@ -39,7 +39,7 @@ extern "C" {
 
 /* Blender file format version. */
 #define BLENDER_FILE_VERSION BLENDER_VERSION
-#define BLENDER_FILE_SUBVERSION 17
+#define BLENDER_FILE_SUBVERSION 18
 
 /* Minimum Blender version that supports reading file written with the current
  * version. Older Blender versions will test this and show a warning if the file
diff --git a/source/blender/blenloader/intern/versioning_300.c b/source/blender/blenloader/intern/versioning_300.c
index 862ef99fca5..cac607ed152 100644
--- a/source/blender/blenloader/intern/versioning_300.c
+++ b/source/blender/blenloader/intern/versioning_300.c
@@ -22,6 +22,7 @@
 
 #include "BLI_listbase.h"
 #include "BLI_math_vector.h"
+#include "BLI_path_util.h"
 #include "BLI_string.h"
 #include "BLI_utildefines.h"
 
@@ -738,18 +739,7 @@ void blo_do_versions_300(FileData *fd, Library *UNUSED(lib), Main *bmain)
     }
   }
 
-  /**
-   * Versioning code until next subversion bump goes here.
-   *
-   * \note Be sure to check when bumping the version:
-   * - "versioning_userdef.c", #blo_do_versions_userdef
-   * - "versioning_userdef.c", #do_versions_theme
-   *
-   * \note Keep this message at the bottom of the function.
-   */
-  {
-    /* Keep this block, even when empty. */
-
+  if (!MAIN_VERSION_ATLEAST(bmain, 300, 18)) {
     if (!DNA_struct_elem_find(
             fd->filesdna, "WorkSpace", "AssetLibraryReference", "asset_library_ref")) {
       LISTBASE_FOREACH (WorkSpace *, workspace, &bmain->workspaces) {
@@ -775,5 +765,27 @@ void blo_do_versions_300(FileData *fd, Library *UNUSED(lib), Main *bmain)
         }
       }
     }
+
+    /* Previously, only text ending with `.py` would run, apply this logic
+     * to existing files so text that happens to have the "Register" enabled
+     * doesn't suddenly start running code on startup that was previously ignored. */
+    LISTBASE_FOREACH (Text *, text, &bmain->texts) {
+      if ((text->flags & TXT_ISSCRIPT) && !BLI_path_extension_check(text->id.name + 2, ".py")) {
+        text->flags &= ~TXT_ISSCRIPT;
+      }
+    }
+  }
+
+  /**
+   * Versioning code until next subversion bump goes here.
+   *
+   * \note Be sure to check when bumping the version:
+   * - "versioning_userdef.c", #blo_do_versions_userdef
+   * - "versioning_userdef.c", #do_versions_theme
+   *
+   * \note Keep this message at the bottom of the function.
+   */
+  {
+    /* Keep this block, even when empty. */
   }
 }
diff --git a/source/blender/python/intern/bpy_interface.c b/source/blender/python/intern/bpy_interface.c
index 945933dd8b7..1a308414bc3 100644
--- a/source/blender/python/intern/bpy_interface.c
+++ b/source/blender/python/intern/bpy_interface.c
@@ -655,7 +655,7 @@ void BPY_modules_load_user(bContext *C)
   bpy_context_set(C, &gilstate);
 
   for (text = bmain->texts.first; text; text = text->id.next) {
-    if (text->flags & TXT_ISSCRIPT && BLI_path_extension_check(text->id.name + 2, ".py")) {
+    if (text->flags & TXT_ISSCRIPT) {
       if (!(G.f & G_FLAG_SCRIPT_AUTOEXEC)) {
         if (!(G.f & G_FLAG_SCRIPT_AUTOEXEC_FAIL_QUIET)) {
           G.f |= G_FLAG_SCRIPT_AUTOEXEC_FAIL;