Changing the default "Open..." directory

Almost every time I use the “Open…” command, the directory it goes to is /Users/username/Documents, but all my projects that I frequent are in a folder on my desktop, so I have to navigate to it every time I want to open a project. It’s not a big deal, but it does get pretty tedious. Is there a way to change the default directory that it opens?
Using Audacity on MacOS 10.13.3.

As far as I’m aware, Audacity defaults to the last used open/import directory on all platforms.

That’s certainly how it works on both my PC W10 system and an my Mac Mojave system.