Putting this up here as much for my future reference as I am to help anyone else who runs into it.
I run dual monitors at work. Actually a laptop with an additional monitor. Sometime if I bring the laptop home, so it’s all by itself, the settings for where apps are located get all confused. This happened this morning. Flash was maximized on the smaller laptop screen. I minimized it so I could drag it over to the larger external display. But it zoomed off somewhere over the rainbow. I tried Alt-Shift, Move to try to bring it back, but no luck. Restarted. Rebooted. It was just gone. I could maximize it to the original screen, but if not maximized, it was out in left field.
I figured the window location setting must be written somewhere. I fondly recalled the good old days of win.ini files… But figured I’d check out the Flash config directory first. There is was, in panelset.xml:
< application maximize="false" rect="50 10 63 22"/>
Actually, my rect had values like -5430, etc. I just set those to less extreme values, saved, restarted Flash, and it found its way home.