Sorry, yes that is everything in the GalCivII world.
As long as you also make a Stardock.net account and use Impulse, you will be able to update the game as new versions get released.
You can create your Stardock.net account here: https://www.stardock.com/sdnet_login.asp
This will be required to log into the Stardock server through Impulse. You will receive a confirmation e-mail that you need to reply to validate your account.
You can download Impulse here: http://storage.stardock.com/files/Impulse_setup_full.exe
