It took me a while to work this out too. The trick seems to be to make sure that you do not put www in front of the web site address. You will then be taken to a site that will email you a serial number. Whether you will get the program to work after that is another matter. When I tried it, it reported that mpg files were of a kind not recognised even though the sample files it installed were in that format. I hope that you have better luck than I did.