Yes - but against that, if the problem was that FFmpeg or LAME are in /usr/local and Mac is blocking read access to that location unless logged in as admin, we know from past experience that repairing permissions can fix that.
And if permissions are messed up, expected behaviour when logged in as standard user or expected behaviour when a folder has a specific permission set may not obtain any longer. Don’t you agree? I have certainly had problems like that on Mac several times.
Given this other user Audacity 2.1.1 and OS X 10.10.4 also had a problem with coming to 2.1.1 from an audacity.cfg file last saved by 2.0.6, I will try switching from 2.0.6 to 2.1.1 some time.
If you find steps to reproduce your (Cyrano’s) issues when switching between Audacity versions, please post the steps.
Gale