Hi all,
I updated the tool to version 1.5.0 with Blender 4.0+ support. Let me know if there are any bugs with it or some ideas I can implement in upcoming updates!
By the way, @Miko I incorporated your much simpler but faster version (hope you don’t mind), it is located under object type as Rigidbody Fast.

The reason that slower procedure exist is that it does more work (duplicating original geometry removing physics and so other stuff).
Changelog:
- Added support for Blender 4.0+
- Code refactoring and cleanup
- Fixed small issues with the armature generation procedure
- Added faster rigidbody generation procedure (simplier version of rigidbody armature generation)