Cubase expired but still Active Artist 7 key valid?

You are right.
Ok I believe I have worked out whats happening. It may or may not be my sheer stupidity.
For some reason I assumed Cubase Artist was a free update from 7.0. I ONLY have a license for Artist 7.0 and NOT 7.5, but my install DVD is Cubase and Artist 7.5. And I’m struggling to find a way to downgrade and/or download a 7.0 version.

I think i may take the easy way out and upgrade to Artist 8 from 7, and download that and start fresh.

Excuse my ignorance on this subject and many thanks for the help thus far.