When you purchase a software product, the license you receive will only work for that specific version of the product. For example, if you purchase iScrapbook 3, the license you receive will only work for version 3 of iScrapbook. If you later download iScrapbook 4, your license will not work to license version 4. So if you're having problems licensing the software, make sure the version of the software installed on your computer matches the version of the software you purchased.