Are you talking about upgrading your game installation or your license code?
Knowing that would help a bit :U
For installation upgrading, start up your game, unregister, uninstall, install new build, register.
For upgrading your license key, go to
http://licensing.datarealms.com/ and select 'Self-Reset key'.
Fill the fields and save your new key somewhere. Telephone perhaps?
Yeah. If it was something else, feel free to complain.