There are different ways to purchase Raily 4 SE. You can either order by postal delivery or simply download the program.
For both versions you need a license key, for unlocking the program.
In the postal version, the license key is contained in shipment. If you order the Download-Version, you get the license key by email. The download version costs less because there is no physical media and no shipping cost. In the download version, the license key is automatically mailed as soon as the payment is received (also on holidays and weekends).