SOLUTION: Evernote no longer supports local notebooks. If anyone is missing their local notebooks, in new Evernote app, go to Tools: check for local notebooks. From there, local notebooks can be downloaded, and then imported into the new app (no longer local). Also, legacy Evernote app can be downloaded and used with local notebooks. More info in thread below.
I'm on a Macbook, MacOS 11.2.2. I was prompted to update Evernote, which I did, but then got a notice saying I have too many devices for basic version. I only use Evernote on my Android phone and Macbook, but my Macbook was listed twice, so I deleted one instance of it. (I don't know how this happened; I've been using same Macbook for more than a year, haven't made any changes.)
Now I'm missing local notes. I do have a Time Machine backup of my Macbook. Suggestions appreciated on how to restore local notes.