If you have upgraded to the Windows 10 but have downloaded the game before you updated, the upgrade could have removed or changed one of the files necessary to run Feral Heart. Try completely removing FH (but be sure to back-up any files such as presets, screenshots, etc., that you wish to keep) and re-installing the game.
Oh, that's not the case... I got a completely new laptop and downloaded Feralheart, then i just took the folder from the desktop (windows 7) and copied it to here and deleted the default one it downloaded with. I can go on FH with the hack tab on my desktop but not my laptop, but my laptop would me much more convenient and run the game smoother, download more things, etc. etc.