The Multi-domain license gives you permission to use the product on as many domains as you want, but only for one single client. For example, you are allowed to use the product on for example fashion-jean.com, fashion-shoe.com, fashion-jean.de and fashion-shoe.de, but not allowed to re-sell the theme or extension to anyone. If you are a developer or a web design company and want to use our product for your clients, you should purchase Developer License. You will be to able upgrade the license from Single domain to multiple domain. You need to pay only the difference in amount. Example: If single domain license is $49 and the multiple domain license is $125 for a specific extension. If you need to upgrade to multiple domain license, you need to pay only $76 to get multiple domain license for the extension. Please contact us when you need to upgrade the license.