can't register or update game

Published on Thursday, April 2, 2020 By vakarr In Sins of a Solar Empire

Hi, I was going to update my game (which I bought on a CD from a shop a long time ago) but find I am unable to register it, and as a result I can't download the update. What can I do? My game is the original Sins of a Solar Empire, no mods or DLCs.