Thanks both for your help. I had someone (who knows more than I) walk me through it. We copied the database folder from TM, replaced the current one, and when we reopened Evernote, we saw it migrating in old notes. For about a second, I SAW THE OLD NOTE at the top of the list during the import (note title "To Do" with date November 2nd, when I last backed up)....but then it was gone. I sorted all the notes by date and by title and it didn't appear in either sort. We tried a couple of times, same result.
Is it possible to copy/import a single note? Through some process, I found hundreds of files with the extension .enspot which I thought might be individual notes, but I didn't have any luck.
This it the first problem I've had in 4 years so I'm hesitant to spend the money on Premium (even though I know that's the easiest solution).