I was fortunate since I was only working with a couple notes when the issue started... If you go to All Notes in the desktop app, one of the sort columns is "Updated" where you can sort all of your notes by last update. If it were me, I would first make a backup of the AppData folder that includes the Evernote database, and then I would start deleting notes that you suspect may be corrupt, using the Updated sort as a starting place for the time it may have happened. Once you identify the problem note, you can restore the backed-up database and delete just the corrupted note. This assumes that