Hair meshes don't import into S4Studio properly

Hi! I'm not new to creating CC, but this standalone hair is my first try to do something like this. I created mesh, cut hair to fit hats and checked everything several times, but it does not work as intended. Old hat hair (which I copied) still shows on top of mine.

what i wanted 
what it shows in S4Studio 

Blender file

Also, I wanted to test it in game, and it didn't show at all

Is there a way to fix it? Thanks