The Regular License grants you, the purchaser, an ongoing, non-exclusive, worldwide license to make use of the digital work (Item) you have selected.
You can’t Sell the End Product, except to one client. (If you or your client want to Sell the End Product, you will need the Extended License.)
You can’t re-distribute the Item as stock, in a tool or template, or with source files. You can’t do this with an Item either on its own or bundled with other items, and even if you modify the Item. You can’t re-distribute or make available the Item as-is or with superficial modifications. These things are not allowed even if the re-distribution is for Free.