We no longer offer individual additions to MenuPro license numbers on a single, per-seat basis.
However, you can still add additional seats (at a discount) using your current MenuPro 10 license number by purchasing the MenuPro Upgrade (which will give you a new license number good for 2 seats at the exact same price as the old MenuPro single-seat licensing rate).
Please click the Upgrade link from the main SoftCafe Order page to purchase additional seats through the upgrade method.