Same here. 14.2.1. Removed App with AppCleaner, reinstalled from both direct download from Evernote.com and the App Store, no difference.
I did figure out that if you don't maximize the Evernote window (keep it at 75%), the flickering does not happen.
Evernote Customer Support is worthless these days, so I have not bothered to submit a ticket, will watch this thread for an eventual fix...