Xara Plugin - Demo Version

[zee]

I just purchased Xara Xtreme. I was playing around with the new plugin features. I tried the AV Bros. Page Curl 2.0 for xara and it is pretty cool, but it is a demo version with watermarks. How do you upgrade to the full version of Page Curl (without watermarks)? I did find some information at xara.com's new plugin webpage, but it didn't mention how to upgrade from demo version or whether there is a cost.