In order to move from ViArt Free Version to the commercial one, you need to choose and purchase the license that best suits your needs. We shall send you a unique license number that you are to activate and put the 'license.php' file in the 'includes' folder of your shop. The purchase of the license will not require re-installing your database or shop.
In case you need to upgrade your license to a higher version later, you will only have to pay the difference in price between the Editions.