Shay has provided a wonderful thread to look over. If, however, y'er still experiencing issues, here's what I've come up with:
Hmm, it may be the name of the FH folders that's causing this. The main folder should just be called "FeralHeart" and not 'ave any of what you mentioned after it.
Also, what folder did ye paste the .cfg file in that caused it to disappear? Was it "FeralHeart_mac_1.13_p8 2", the one that I assume should be named just "FeralHeart"? If so, try 'gain and see if anything pops up asking ye to r'place any files.
What is the .cfg's file name? It could be needing to be renamed. If I r'call, but I may stand incorrect, marking files should 'ave a .cgf file and not a .cfg, but I may be wrong on that.