Hello! I'm going to split your comment into it's own topic so it's easier for people to help you =)
If you've installed FH and downloaded the new .exe, you need to first delete the old one already in your FeralHeart folder you got after running the downloader. It should be located in your C: drive. After deleting that FeralHeart.exe, you need to move the new FeralHeat.exe into your main FH folder.