Make sure you are downloading it from the downloads portion of the main site and not from a third party source. As long as you are installing from fresh you should not need to patch the game since it should be up to date. Make sure you are running the correct version patch.
If you are unsure, completely uninstall Feralheart from your computer. Then run the .exe for the installer of JUST THE GAME. Then run the .exe for the patch. Make sure they are both pointing to the same directory.