Many thanks.
If you read our latest post from XNurbs Rhino plugin is available!, you can see that, right now, we need some experienced surfacing designers like you to demonstrate how to use XNurbs for different operations/scenarios/applications. (While XNurbs is the easiest-to-use NURBS software, without the help from experienced surfacing designers, some users may only use it in trivial cases.)
An update will become available in the next couple of days. If you need it, we could give you a link to download it.