I myself had a problem similar to this one, except my FH would pop up with the infamous "has stopped working" window. I was advised to uninstall and then reinstall FH which I did and it fixed the issue.
So, first make backups of any files you want to keep, such as presets or screenshots etc, and then what you want to do is go into your FeralHeart folder and look for the uninstall application (should have a mini computer with a CD as it's icon), then once its uninstalled, delete the folder itself and clear it out of your recycle bin. Once that has been done, reinstall FH and it should work then.