Thanks, this works better than I expected. I tried zooming 2 different .jpg pics to 400%. One was some people by a sign with a lake and city in the background. The other was a closeup of a pet. There was a noticeable improvement in both pics. I like that we can choose which method to use. On my test pics, the process only took a second or two. As in many of their other programs, there are several ways to preview/compare the before/after pics, I really like the slider where you move a vertical bar across the pic with the processed pic on left side of bar, original pic zoomed to same size on right side.
Will definitely use this if need to print or use smaller pics in my projects, or if I want to use a small section of a larger pic.