PSA regarding the new Style settings and Concert Pitch
When I loaded scores I made with previous versions of Musescore and changed to the new settings, I found it messed up my concert pitch. I would have the key signatures all be the same as if it were in CP, but the actual notes would be transposed as if CP was off (the CP button was on, btw). The fix, however, is that you have to be out of Concert Pitch BEFORE you click "Reset all styles to default." I'll put this in the Issue Tracker as well with steps to reproduce.