So... over two business days have gone by with ZERO response from Evernote. Over the past 5 years I've been their biggest advocate with colleagues, family, and friends, so this makes me a little sad. I'm having the high CPU issue again, of course, so I thought I'd share an image of the situation...
Evernote, please respond to Ticket# 2690384. I'm happy to help troubleshoot, but you have to engage!!!
Anyone that has a tip about where I can find a prior "stable" version, please let me know.