This is becoming an increasing issue, Feral heart seems to break after you export a map. Move everything important that you want to keep out of the fh folders into your documents, uninstall FH, delete all files fh related that are left behind, delete the shortcut on your taskbar (only if you have windows 7 and have it on your taskbar), delete the FHsetup, redownload the FHsetup, reinstall, apply patch and it'll work