Mark,
You may be correct about the NovaBACKUP application as I do not heve the exact experience with this application, but I have yet to see where a vendor does not allow a way to apply a purchased license to a trial/demonstration application.
Under my version, v12 that is, see if you have the following menu items.. Either \Help\Registration or \Help\License. For me,they both poiint to the same location. Perhaps you might need to register the trial version, if you had not done so. Then, perhaps, you will beable to access a page to input the license. Even whne I purchased my LinkStation Mini in January 2011, I had to request licenses from NovaStor. I started with V11, but then upgraded to the v12.
Even if you do need to uninstall the trial version, just be sure to not delete any settings, scripts, etc. Those should be picked up upon the new installation.
Hope this helps.
R/
John