I absolutely adore this addon!
I've tried updating it to work with Blender 2.80 just for fun. I got pretty far, but then I realized that Carve is gone and the newer BMesh Booleans can't handle coplanar faces... :( Apparently it's being worked on, but for now we seem to be stuck on 2.79..
Anyway, thank you for this inspiring tool! It will be great to use it with Armory in 2.8x one day