I have the latest version of Mattercontrol and I've been messing around in it. I've however noticed an issue now. When I try and subtract from a part with multiple other parts, it doesn't work. The progress bar at the bottom freezes and it just stays stuck on "Classify Faces 2". I've seen another topic on here about the same issue, but I haven't seen anything on a fix. Is there one? I'm loving the program otherwise, it's just this issue that I'm having.