David, while the command window is open, I often cannot interact at all with open Explorer windows. (w7, 64 bit). I type S or Q and it gives me control back. I cannot tell if there is an open window somewhere behind the Explorer windows (Like one for locating the output folder or command file) but it looks like not. I notice that having one of these open does not prevent another one from opening if I type in the letter that calls it up, so it is possible that I’ve had two open, one hiding.