I have a few question regarding the installation of anyDVD....

I am considering buying the reg key for my already finished trail version of the anyDVD product, but I wanted to know first if the key can be used on multiple units or is it unique to the machine from which it is primarily used? In other words, if I own a desktop and a laptop, can the same key be used on both machines, or does a seperate key need to be purchased?

PLEASE HELP?