Version 3.2.3 crashes when opening if the 3.3. RC is installed
1) Install version 3.3 RC.
2) Open the 3.2.3 (double-click icon, or right-click/Open)
Seen twice on the French forum, here: https://musescore.org/fr/node/295210#comment-948886
(personally, I can't reproduce, but since I always restore the default settings when I change versions - the palettes are concerned so - maybe that's the reason, I don't know)