Thanks for the update! I did the uninstall/reinstall and it did NOTHING to fix it. But if 10.18.3 is REALLY the current version, the Mac App Store is quite a few iterations behind (I realize by the nature of how the App Store works that it would be a little behind, but they're showing 10.17.8 as current).
I'm going to download directly from Evernote and see how it goes.