Okay now I don't know what's going on. Last night after I re-enabled UAC, I ran a FileSync, figured everything was fine, and re-disabled UAC and went to bed.
Except the same "missing" files weren't visible on the internal HD this morning. Okay... re-enable UAC again, reboot, and use Windows Explorer to browse to the internal \Mids\Save\ folder.
The files aren't there. Now this is getting really strange.
Shift to Mids, do an Open File and just
looked at the screen.
The files are back again! ("Missing" files highlighted by me to draw attention to them.)
All right. Then I'll do this the more convoluted way and copy the files from the Open File window over to the external HD. Which would work,
if Windows could see the files. Insert muttered curses here.
Yet strangely enough, for a file that is Windows is blind to,
I can load up the build. What. The. Fark.
Next I'm going to try exporting the builds to text files and re-import them with a different save name. I've also started a full internal HD scan with Avast. Let's see if it shows something.
-- Lady T
Edit: 26 minutes later and no infected files detected.