GkSetup ECommerce-Edition contains a Serial Number mechanism that encodes a 64Bit keycode in serial aumbers. This keycode can be freely defined by the Application author.
You can see a valid sample key in the image above. The "Generate" button can quickly generate a new Keycode. The keycode you enter here will be used to encrypt the data files. You have to specify the same keycode for the serial number generator. Otherwise your users will not be able to successfully decode the files !
Please note that the Generate button can only produce semi-random values. You should define a keycode yourself. Valid keycodes contain 8 byte of data. Each byte is encoded using the hexadecimal system.