In your main Feral - Heart folder, there should be something like the 'unis000.exe' and I'm pretty sure you just run that.
But what I've done in the past and it worked just as well, was basically right click my shortcut icon and deleted that.. and then went into my C - Drive and right click the Feral - Heart folder and deleted that as well.
Then I simply went to my recycle bin, right clicked that as well and empty it since I usually keep it empty anyways and then went to my downloads and reinstalled the game. But if the problem persists I recommend deleting that as well from your downloads and redownloading the game altogether.