If you have a legacy permanent license, you can enter the email address used during purchase on the Renewed Vision Lost Code Recovery page to have your information sent to you.
The phrase "ProPresenter 7 license key" can refer to a few different things depending on whether you are looking for your existing credentials, trying to buy a new seat, or looking for information on the ProPresenter+ maintenance plan. Understanding the Modern License System
However, the landscape of software licensing—and the risks associated with pirating it—has changed significantly in recent years. Here is a breakdown of the current situation.
If you are upgrading your hardware and need to move your license key to a new machine: Open ProPresenter 7 on the old computer. Go to the Registration window. Click "Unregister."