Many of us have the need to upscale the resolution of SA images, eg from 1000x1000 to 6000x6000 pixels.  But that task is very demanding, since the second upscaled image will have 36 times as many pixels as the lower-resolution image.  How can sharpness etc be preserved? Before now, my go-to program for this kind of task was Photozoom Pro 7, which worked as well as anything else I'd tried.  All s…