You need to purchase a license if you want to use Coverage in production. To start the registration process, click the Coverage menu and select the Registration... item.
You will see the registration window with empty serial number field.
If you haven't purchased a license yet, press the Purchase license button. This will open your web browser with the order page where you can purchase a license. You will receive the serial number by e-mail usually within a few minutes after ordering.
Copy the serial number from the e-mail and paste it into the registration window.
Make sure that you have copied all the lines of the serial number from the e-mail, then press the Register button. You will see a registration confirmation message and Coverage will be switched to the registered mode immediately.