This is how the program looks when you start it. You enter the about screen which gives information about the program and a few shortcuts to this website.
When using the free version of FindDoubleFiles you'll also see this box for entering your serial number. When you buy FindDoubleFiles Pro you will receive a serial number. Enter it here and the program gets upgraded to the pro version instantly and automatically after you press the unlock-button.
On the top of the screen you see three tab controls. You can use them to go to the two other pages of the program: Search and Results. (You can use the keyboard shortcuts ALT-S and ALT-R as well as the mouse) Normally you go first to search for defining or loading an earlier defined search and then to the results to see which double files are found.
