Bought Demigod on Steam Sale

Published on Friday, April 6, 2018 By TokyoDan1 In Stardock Games

I bought Demigod on Steam. It is on sale now. I installed it but when I try to run it a Stardock Account Registration pop-up appears asking for the serial number. Steam provides no such serial number.

My Steam purchase Transaction ID is: 1423576102903848595