Oh, shouldn’t the “View version 4.0.56 details” link have included info on this issue even though the plugin had been removed from the repository?
This is a known issue that we have not been able to fix at this time. We don’t use this “hidden but updating” status very often, so it’s not fully feature complete. Nevertheless, the update process itself works fine.
The update worked fine, but the plugin no longer allows access to the “Settings” dialog. I have a client who changes the settings on a weekly basis. No offense to you, but this makes my search for a replacement more urgent than it should be.