SUPPORT: Can't logon to Demigod
Problem: You load up Demigod, click Multiplayer, choose Internet, and type in your Impulse User Name and password and the game does not accept it.
Most common cause: You purchased the game via Impulse with a different email address (i.e. different account) than the one you're using.
Solution: Merge your accounts: https://www.stardock.com/support/registrations/
Second most common cause: You created a second Impulse account some other way. Solution is same as above.