Followed instructions and installed successfully. You need to click on the link in the email they send you to visit their webpage to register your email – they will then send you a registration code and userid which you use to install the program with after it is downloaded. When you startup the program, you have to enther a serial number which is the same as the registration code they gave you. Tried stacking a few photos and came out pretty good actually. The program does most of work automatically and gives lots of options to choose from for different effects. There are lot of expert type functions which I haven’t figured out yet. Thanks Ashraf.