If you downloaded the 15-day trial version of Diet Power from a Web site, you can make an installation disk or diskettes for putting the program on other computers or restoring it in case of a hard-drive failure. Then, if you've already bought a key to make the trial version work permanently, you can get a free "spare key" for the new installation.
To find out how to make an installation disk or diskettes, see "Second Computer, Installing Diet Power on" in the Index of Common Problems on our tech-support page at www.dietpower.com/tech.htm.