Figment, I'm not sure but..have you tried this page I posted about earlier in the thread?
https://store.stardock.com/login.aspx?ReturnUrl=/myaccount/products
I don't even have gamestop/impulse installed anymore and haven't bothered with it since Stardock sold it to gamestop. I haven't had to change or update anything, just used my old info. I just DLed fallen enchantress from stardock directly... I used the stardock central tool (although you don't have to) from sd itself, which is a program like the GoG downloader that allows you to pause and resume your downloads.
https://store.stardock.com/login.aspx?ReturnUrl=/myaccount/products
I don't even have gamestop/impulse installed anymore and haven't bothered with it since Stardock sold it to gamestop. I haven't had to change or update anything, just used my old info. I just DLed fallen enchantress from stardock directly... I used the stardock central tool (although you don't have to) from sd itself, which is a program like the GoG downloader that allows you to pause and resume your downloads.