I’m exporting audio to mp3 in mono. Audacity used to remember my last export settings, but in 3.7.1 when I export to mono, the next time I’m exporting, the window will be selecting stereo again.
Yes you’re right.
I think that what is happening now is the that if you have a stereo track or tracks to export then Audacity assumes you probably want a stereo export, whereas if you have mono tracks it assumes you want mono out put (testing on W10 with 3.7.1 seems to confirm that behavior).
I suspect that Muse changed it to be that way when they reworked Export Audio to be the single consolidated dialog a few releases ago.
Peter