Uploaded Beta7m.
http://www.fish-byte.com/MA3Beta.zip
Fixed some dual-monitor problems, including:
The missing-background (flashing) problem on second monitor.
Size of the image on the second monitor when the monitors were set to different resolutions.
If Windows used the second monitor to bring up the Display Properties dialog, almost the whole screen got cleared to black (nearly everything except the tiny Preview window).
Preview window in Display Properties was blurry due to a bug that I introduced on the last round of changes.