Well you fixed most of it.. Starting in windowed mode and going full screen the dusters work perfect. Speed is good and they close / open individually.
But.. there is a real inconsistency.
Open in windowed mode.. drag window into second screen. Works.
Open in windowed mode > go full screen. Works.
Open in windowed mode > go full screen > go windowed.. rascals are frozen.
Change settings to start full screen.. dusters work.. > go windowed and they freeze. However.. toggling back and forth windowed / full screen and the dusters work each time one is in full screen and not when in windowed mode.
Hope this makes sense to you Jim.. I can see where this would be something frustrating to resolve.. Good luck