Not too sure what would be causing this but you can check and make sure you did everything right:
~Copy and paste the items.cfg into the Local Disk (C:)>FeralHeart and replace it with the old one
~Dropped all of the items into the FeralHeart>Media>Items folder and replaced everything
Sorry if this doesn't help, but I hope it does a little ^^; If it came with a ReadMe you could look over that to see if it solves anything