I downloaded the program, dragged and dropped 252 files to change the contents of, defined what copy to change (from x to y), and then it said it did it - but the files did not change at all. It WOULD save me hours of work, if it did was it said it would do. There are no additional instructions than screenshots on this page (which anyone could infer by looking at it once opened), so I have no idea what else to do. How does it work, if it only says it made the change (without actually making changes)?