It may not have replaced the files correctly. If it uses certain kind of techniques to replace and update files it may be blocked by windows. Also if feral-heart is installed in some place other than C/Feralheart you need to point the patcher in the proper direction to make sure it updates the files correctly. If you think you did everything right, completely uninstall FH and install it from scratch, or try running the patcher with administrative permissions.
Hope this helps.