>>372140910
it's specifically and ONLY made for MMD models, and maybe XPS or some game rips like UE3 models. if you use it on anything else you are more likely to break something. it's advertised as such.
in short, skill issue.
>>372169119
CATS has plenty of other tools that are amazingly useful for non-MMD's as well. Just stay away from "Fix Model" if you're not importing a new MMD model.