Having recently upgraded to Mojave, I also installed the latest version of Audacity, 2.3.2.
I used Audacity for many years, up to version 184.108.40.206. These versions all showed full toolbars above the tracks area, but this is no longer the case with 2.3.2, which looks like this:
I tried returning to version 220.127.116.11, but this seems to have somehow been corrupted by the installation of 2.3.2 and its toolbar is now split into a number of individual toolbars, separate from the tracks window.
Can I get the toolbar in 2.3.2 to work the way it was in earlier versions, i.e. as a fixed part of the tracks window rather than as floating elements?