BUG: the shortcut key to open Preferences is CTRL-,
That shortcut key is NOT functional on any other keyboard than the US keyboard. Why not get back to the original shortcut key which always worked in previous versions: SHIFT-F8.
Using a punctuation mark in a shortcut key is always a bad idea, because its location is not fixed, depends on keyboard.
BTW I use an AZERTY keyboard, thanks for fixing the beta bug CTRL-Z.