This might be related to the fact other settings I set via Garmin Express for datafields/watchfaces never set either
but maps never install on the watch despite Express going through the motions over and over.
Next time it starts it asks to install the same maps.
It's not a USB problem because other things like EPO.BIN and TRUEUP and activity transfers DO happen properly
But CourseView and TopoActive maps keep asking to install, same version, over and over
(btw wishlist would be to "hide" the TopoActive and stop asking, I do not want to install a eight gigabyte map)