Ok, so the upgrade broke some of the extensions. One thing I did in the past was to set up “undecorate maximized windows” . Worked pretty nice with the additional setting that added window buttons (close , maximize, minimize) to the top bar when window was maximized.
The problem is white the latter stopped working (no buttons), the former still is
Any ideas what sort of setting etc. has been made to achieve this undecorate behavior (get back to default state)? As I’ve just reset dconf (to get rid of other problems after updating to 45) I guess it’s not something there.