Sorry I don't have a windows machine to test/fix this at the moment. I only have a linux machine and exported from the Godot 4.
I should have answered sooner, but I'd like to offer my help to port it to Windows. If you want to make it open source or just a private collab, I'd like to help ('cause I'd like to use it XD). I have a lot of Godot experience.
Here you go! https://github.com/mingqianye/smoother
