I was adding some stuff in Creation Master (boots) and then I imported some faces. I loaded the specific head model, then imported the two .fsh files. But then all my imported files were gone! All my kits, balls, boots, etc. dissapeared! But my edited stats and team rosters stayed the same! What is going on?

Also, before this, I imported these faces, but the game crashed when I used a team with these players. Please help!

Yes, I had the same problem caused on my game. Had to reinstall, be sure to have back up files on .cmp patches.