NavBars created with the trial version will contain a menu linking to http://xara.com
This is just a feature of the free trial. The menu link is not present in the purchased version.
If you have created a NavBar & menu using the trial and wish to continue using it after purchase, then start the program and select projects, then select the project folder in which the edited template resides. Select the template and edit it so that the menu link to Xara is removed, then save the NavBar.