1. Found the way to make "Remove Materials" feature stable.
2. Fixed Brutus crash in "Null Skin Meshes". We can make just another "Except" list for meshes. The problem was Brutus name - it's not just "brutus", but "Brute" as well. If you've found other unstable situations, please let me know.
3. I'm going to add new "Index" tab to make file names search easier. It helps to find "Except" rules for particles too.
Work in progress, coming later.