I will run maintenance AGAIN, but here is some history:
About 2 weeks ago after a windows update I had to reinstall eLicenser Control Center and get new licenses. Problem fixed.
About 3 days ago I got the obnoxious No Valid License screen while online and ran maintenance. - Problem fixed.
Today, after working fine in the morning, I got the message AGAIN.
Later while online the problem went away.
I have been using (and very occasionally writing) various software packages for over 50 years and in that time I have NEVER encountered a more unstable or less robust license mechanism. No program before this (with costs ranging from $0.00 to $70,000.00) ever had need of a maintenance button or repeated downloads just to allow me to run it. From my experience and in my not so humble opinion, the soft eLicenser is a piece of excrement that should be destroyed and replaced with something stable, robust, and user friendly.
And, yes, I have the latest version of Dorico.