I didn't think I'd be revisiting this post again, but...
Today I tried to print and my printer settings were gone, again. I looked in the directory that Rhossydd (posted below) had turned me on to and the *.ucf file was simply gone. Vanished. No, I didn't delete it accidentally since I never go that far into the weeds unless forced to.
Fortunately, I had a backup of that file, having learned from experience, and I can now print with all my settings intact. I don't know why that file disappeared, but I am going to postulate that it was one of those 'drip-drip-drip' Win10 non-optional "updates" that can wreak havoc. Color me disgruntled, but without a proven target.