thanks, @efan! your dump and downgrade strategy worked for me too. Good luck to others dismayed by the overheating.
I'll add a few observations as data points: Evernote was consuming quadruple the 12-hr power of any other apps, and the fan would kick on within moments of starting it. The problem definitely started with the 10.52.8 update. I'm on a 2020 MacBook Air, 1.1 GHz i5 processor, 16 GB memory.My database is small, mostly text, few attachments or images, so the rebuild was essentially instantaneous.