Regular License
A regular license allows an item to be used by you or one client in a single project or end product, either for personal or commercial use. The item cannot be offered for resale either on its own or as part of a project. Distribution of source files is strictly prohibited.
Extended License
An extended license allows an item to be used by you or one client in unlimited projects or a single end product where end users can be charged for access. The item cannot be offered for resale "as-is". It is allowed to distribute or sublicense the source files as part of a larger project, provided that the item is significantly modified or integrated into a larger work.