Well now my Kimera runs fine, thanks for everybody who helped me.
But, I encountered another problem: When I try to open Cloud's battle model it gives me errors and shuts the program, and when opening the other playable characters battle models there's just a yellow triangle! Monsters/Vincent's transformations work fine tho.
E: Darn, I'm stupid, I was opening the wrong file!
I have another problem now tho: Why do all parts I edit become darker? I did some testing and even opening a part of the model and then applying it makes it dark!