Have you tired to open its data files in another progrm to see if the data is readable. That would be a caution if you e-mailed the file somewhere and then found you couldn't open it on another PC. One suggestion I would make it to save the program installer as well as the data files on a cd, I used to do this a lot when I would download a program because it always seems to happen that the program isn't available a few years later when I want it.