Well, your exporter could also be broken.
To fix that, you have to rename your FeralHeart folder to something like "OldFeralHeart" and then you'd need to download FHSetup.exe again, and install that, which will create a shiny new FeralHeart. Then just copy over your preset folder from my_presets. Go ingame and re-export it, reupload, and try it then.
If that doesn't work then I don't think it's a problem on your end.