I started FGU, clicked on CHECK FOR UPDATES, the updater started and I got busy entertaining myself in a web browser while the download process started. I noticed that the updater snapped closed - so I relaunched FGU and now get:
https://i.imgur.com/LQIrcV5.png
It would be nice if the updater were available for download rather than reinstalling over the top of FGU.
Thanks