Demigod on hard disk but not responding with Impulse

So i Installed demigod like 2 weeks ago but yesterday i formatted my pc but i decided to keep the demigod folder , however , now that i placed it back in stardock games my impulse isn't locating it , i started the game and tried to update which leads me to impulse which still think it isn't on my pc.

I know this problem has to do with my registering ( to my pc ) that isn' tactive now , is there anyway to make it active again ?