Yep. Congrats by the way. Motorola sure makes it difficult huh? lol
Go to MOL and click on "Resource Center" at the top. Then on the left of the page select the "Software" drop-down, then "Two-Way" and finally, you'll see your subscription.
If you have a slow connection, it can take a while to download. There will be several downloads there, but the one you're looking for is the zip file with the name of the CPS (XTS3000_R05_00_02.zip).
If you don't see it there, just give them a call, because someone there forgot to add your account to the download area.