Thanks, NothinG, for the -rescan tip. CTRL+F didn't work (is that feature dropped on newer builds?), but fortunately I had saved the previous Data Directory by renaming it, so I renamed it back and restarted bitcoin-qt.exe with "-rescan" on the command line. VOILA! in minutes instead of hours, it came up with the missing coins.

Thanks, too, to paraipan and others who provided tips. You're awesome!