I used the tool to separate out arms for Opsive UCC. That worked perfectly, but when I restart the Unity Editor, I get an error that it can’t load the editor layout and this shows in the console. I’m on Unity 2020.1.10f1.
That’s an odd one. I don’t see anything in there that’s obviously related to FPS Mesh Tool, but you might find it helpful to reset your layout via Window → Layouts.
If that doesn’t work to resolve things, you might find useful information here or here , though as always be careful when following advice you get on the Internet.
