upgrading to unlimited

Was looking to:
1) Renew my current 10 domain license - All went okay
2) Convert my 10 domain license to an unlimited license.

For #2, I see the maximum upgrade is to 100 domains.... Nothing is listed for the unlimited version.

How do I upgrade from my current 10 license (plus the renewal) to the unlimited version?

I'm assuming I can move this to a different server (currently in a test environment but will want to move to production).

Closed (fixed)