Still No Ultimate Extras after upgrading RC2 to RTM

I did a clean install of RTM on my home computer and was able to find and
install any ultimate extras.

I had the RC demo version installed on one of my workstations at work.
Extras were not available for the RC demo version.

I ran a successful upgrade to RTM on it, but extras are still not available
for it.

Please don't tell me that I need to do a clean install. I already know that
that is an option.

Does anyone know how to fix this? There must be a flag somewhere in the
registry.