Thank you, PinkElephant.
I'll follow your advice on the forum thread regarding laggy EN on Windows (AppCleaner, Uninstall, Re-download), and see if it works. Will report back here via edit of this comment.
EDIT:
Thanks again — I had to reapply my personal settings/views/sort options, but other than that, it worked a charm. Steps I took:
> Downloaded AppCleaner and used that to uninstall Evernote.
> Shut down Mac completely.
> Restarted Mac; went to EN website and re-downloaded/reinstalled latest EN
>> Keyboard and trackpad reactivity are now back to normal 🎉
I'm marking @Boot17's answer above as the solution for this thread specifically, but the original suggestion in the link provided is from @PinkElephant. Thank you both.
Ab👏so👏lute👏ly perfect
It was the "Screen Recording" option. I wasn't even aware of this option, but somehow over the past couple of days, it became unclicked.
Thank you so much!
