Hi Geoff and Splasher,
I'm sorry, but I could not find SAVE AS in Quicken. (I looked in File Operations too.)
I tried a rename in W10 Explorer (I renamed from QDATA-NEW 11-30-2019.QDF to QDATA-NEW.QDF).
I then clicked on the renamed file, but Quicken recognized it as from 2004!
What the heck am I missing or doing wrong?