According to the links I find via Google, we should expect to see a Create Group button someplace. We can't find it anywhere. Without this, there doesn't seem to be a way to make groups. Where is it SUPPOSED to be and why can't we find it?
I would take this to the WP Symposium forum, but I am supporting a Bronze member who is trying to get your plugin to work - and I am not a member over there. Also several links to your admin manual go to a Dropbox 404 page - not found.