Hey Andreas-
You sure can. You'll need to run some alter tables, but you can definitely upgrade <img border="0" title="" alt="[Smile]" src="images/icons/smile.gif" />
Here are the instructions for upgrading, you'll want to follow them closely!
http://www.infopop.com/support/ubbthreads/UBBThreads_within_licensed_upgrade.htmlKristi Horn
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