I uninstalled Fences, rebooted, then reinstalled, and now the endless update cycle has gone away, so thanks for that!
However, I have another problem now. The scroll function within the individual Fences no longer works properly since this update. The slide bar at the right-hand side runs the full length of the Fence, showing no space above or below to indicate where there are more items to scroll to offscreen, even though I know there are plenty of items to scroll to beyond the size of this Fence. Additionally, if I click on the slidebar and try to slide it to scroll, no scrolling happens. All that I can get to happen is the Fence will "snap" from the top to the bottom of the list of items contained within it. It will go top to bottom and back, but no scrolling through the items in between.
This is on a recently-purchased new HP Envy 17 laptop running windows 11 which had no problems running Fences correctly prior to this most recent update.
Any advice would be gratefully received. Fences is not completely unusable, but I would definitely put it in the barely usable column at this point.