Upgrade from 3.52 GPL to Pro

Please help. I have purchased the Pro version (after testing the GPL version and on Eric at OpenThought.org’s recommendation).
The upgrade seemed to go ok…no errors or glitches.
But my install still reports the GPL license, and still only has the GPL features.
When I check on my license, under the re-check license link, I get a file not found error.
What did I do wrong?

nevermind…Eric found this:
<eric> there’s actually a button in the virtualmin UI

That did the trick!