Ensure Alpha 2 can mot load on Blender 4.5 or above.

__init__.py

@@ -1,7 +1,25 @@
+import bpy
+from bpy.app.handlers import persistent
+
 modules = None
 ordered_classes = None
 
+def show_version_error_popup():
+    def draw(self, context):
+        self.layout.label(text="Sorry, this version of Avatar Toolkit does not work on this version of Blender.")
+        self.layout.label(text="Please check the GitHub repository for the correct version for your Blender.")
+        self.layout.operator("wm.url_open", text="Open GitHub Repository").url = "https://github.com/teamneoneko/Avatar-Toolkit"
+   
+    bpy.context.window_manager.popup_menu(draw, title="Avatar Toolkit Version Error", icon='ERROR')
+
 def register():
+    # Check Blender version first
+    import bpy
+    version = bpy.app.version
+    if version[0] > 4 or (version[0] == 4 and version[1] >= 5): 
+        show_version_error_popup()
+        return
+    
     # Add wheel installation check
     try:
         import lz4
@@ -30,7 +48,6 @@ def register():
     auto_load.register()
     
     # Verify property registration
-    import bpy
     if not hasattr(bpy.types.Scene, "avatar_toolkit"):
         from .core.properties import register as register_properties
         register_properties()
@@ -39,4 +56,4 @@ def register():
 
 def unregister():
     from .core import auto_load
-    auto_load.unregister()
+    auto_load.unregister()