Dust Buster Crash

Dust Buster will crash program if you outline a box to fix an artifact, then outline another box before the first box finishes processing. The program hangs, but never recovers. So you have to perform a control-Alt-Delete and 'End' the program. Recommend some coding to hold or cancel the drawing of another selection box if the program is still busy with the first request.
Comment: Some may comment that one should be patient and wait for dust-busting to complete in one selection before drawing a new box. However, when you are working on removing many small artifacts per frame and each frame may represent only 1/18th or 1/30th of a second (depending on frame-rate), you are trying to complete the work as quickly as possible.
Comment: Some may comment that one should be patient and wait for dust-busting to complete in one selection before drawing a new box. However, when you are working on removing many small artifacts per frame and each frame may represent only 1/18th or 1/30th of a second (depending on frame-rate), you are trying to complete the work as quickly as possible.