Did you click on “Check now” in the Updates panel?
For a while after an update is available Rhino will continue to report that “This Rhino is up-to-date” unless “Check now” has been used. Rhino may not actually check for updates when “Check for updates” is selected. It is an intentional feature to reduce workload on the server.
Yes, I just realized the image I posted was from Rhino 6. I believe the “Check now” option was removed in Rhino 8 WIP so there is no way to check for updates until Rhino decides to check. @Brian is the person who could explain why.
I was talking about the “Check now” box on the “Check for update” page. That box is not available in V8 WIP. See the comparison of “Check for update” pages in jmv’s post.
When Rhino reports “This Rhino is up-to-date” it means no updates were available the last time it checked for updates which may have been hours previously. Rhino does not automatically check for updates when the Updates page is opened or even when Rhino starts. The missing “Check now” box allowed the user to have Rhino immediately check for updates.