Well users whom purchased vbgallery from us for $99.00 or above I beleive are able to use vbgallery or photopost which ever ONE they choose. Now if you purchased vbGallery from us or vbAdvanced for the $59.00 price then you need to purchase a Photopost Pro license. When our licensing merged in September 2007 users where given the change to convert there vbGallery ONLY licensing to a full license for an upgraded price for a limited time. You would have received that email back then.
You can tell what licensing you have by signing into your members area. If you see Photopost Pro then you can download and switch to that software using the import scripts available. If not then you need to purchase a Pro license.