This license is good for one instance of the Product that you purchase. Perfect for site owners with one domain name. You gain access to a commercial Product with all pro features at an affordable rate. It's a popular choice for many. By 'Single-Site', we mean one 'instance'; i.e., you can have the Product active on one WordPress installation at a time. However, your license key can be deactivated and moved to another site as often as you like.
Note: If you run a WordPress Multisite Network with a Product activated on multiple child blogs or sub-sites within your Network (whether you use sub-domains or sub-directories), this will always require a Multiple-Site License. This is because our Products run as a separate instance on each child blog or sub-site in the Network. To clarify, a Single-Site License does NOT provide support for multiple child blogs or sub-sites, even if they do run within a single Multisite Network installation of WordPress on the same root domain. A Single-Site License is valid for one 'instance' only.
Multiple-Site License (e.g., Up to 5 Sites, or Up to 25 Sites)
This provides support for X number of Product instances, depending on what you selected during checkout. Perfect for site owners with multiple domain names, and/or those who operate a WordPress Multisite Network installation. Each of your Product instances must be installed/activated on domains that you own & operate; e.g. you cannot buy a Multiple-Site License and use it on client sites that you do not own.
Unlimited-Site (Developer) License
This license is specifically for developers that intend to use the software themselves, but also on client sites they work on. Paying once for an Unlimited-Site (Developer) license is often easier and cheaper than charging each of your clients separately, or asking them to make a purchase on their own. With this license, you pay for the software yourself. This way you can install and activate it on any number of client sites that you build now or in the future.