You do not need a serial number. After having extracted files from the zip file, you are supposed to install the program from the unzipped folder. If the program doesn’t launch by itself, double-click the desktop icon to start the application, and then make sure to exit (close) the program. Now double-click on the key file (which is included in the unzipped folder), and after having done that, you should see a message saying that the program has been registered successfully.
Hope it helps.
Cheers,
consuella