Same problem here, got my game in the summer steam sale and never had any problems. Now I want to try getting into mods and I can't even start up Silverstag because I have a 6x4 mbwb-xxxx-xxxx-xxxx-xxxx-xxxx serial key. Sent two emails to Taleworld over the past couple weeks but no reply, really just hoping to get this sorted so I can play some mods.