Thanks Sole Soul, good to know 2.01 is the final DA patch!
However I tried reinstalling after cleaning up Endless Universe leftovers and then I also tried deleting sig.bin which allowed me to enter my account information and serial again.
After that I did it once again folowing the procedure Nakor (Stardock) suggested to fix TotA-Metaverse problems (that I don't have, mine worked right from the beginning).
- More/better fix to make sure all HKCU settings keys are set properly from registration:
Start / Run / regedit.exe (will request elevation)
Erase C:\ProgramData\Stardock\GC2UL\sig.bin (will request elevation)
May need to remove the sig.bin from ProgramData\Stardock\Twilight instead.
Run the GalCiv2\Twilight\GC2TwilightoftheArnor.exe and enter your Stardock account information and serial when prompted.
This will update the registry keys in HKCU that you just removed as well to cache the user credentials the Metaverse login is expecting.
Didn't help, TotA-Metaverse still works, DA (as well as DL) doesn't.