This application is discontinued and is not supported anymore. The Ulead has been acquired by Corel and their applications discontinued or merged into the new ones. The only way to obtain additional info about it is through direct contact, but I doubt they still offer serial numbers and keys for this application.
Support page: http://www.corel.com/en-eu/contact-us/
I recommend chatting directly with them as it's faster and you'll obtain an immediate response and a solution to your inquiry.