are you logged into your user account in the Rig Manager preferences? This is mandatory for the Rig Manager to access the webserver for updates.
And that's done it, thank you very much. I will suggest that this was in no way intuitive and that I presumed that the login was for Rig Exchange only.
Perhaps an addendum to the manual, (or it's just there and I missed it)>
Still, thanks again. We are off to the races.