When I open 3.6, I receive a popup asking if I want to open a previous session (I don't have one). I select No. The workspace opens up for a split second then crashes.
I can open Muse Score if I use Terminal with this command.
/Applications/MuseScore\ 3.app/Contents/MacOS/mscore -F -w
Once I exit Muse Score the issue repeats itself.
I'm using a MacBook Air with MacOS 11.2.3