Note that for some reason this option is only available in the Windows client. I had to boot into Windows on my macbook to do the export a few weeks ago.

For regular backups I use time machine which includes the user data folder: https://support.evernote.com/link/portal/16051/16058/Article...

And if you're on Linux, Nevernote can sync and then export in a format.

Thank you! Just took a backup with the desktop tool..