I'll be updating this version into a newer one soon, so for now, feel free to try Dev branch from this link https://github.com/vini-guerrero/Godot_Game_Tools/tree/Dev or if issue still persists, you're welcome to open a github issue so we can analyze your case in particular. Most likely this issue is happening due to something wrong in Windows + Blender environment but we can sort it out. Other users had similar issues and all were able to fix it. Thanks for getting in contact.