You can use Miraplacid Publisher up to 15 days without registration. Then you have to purchase and register or stop using it.
If you print with unregistered Miraplacid Publisher, Registration dialog will pop up.

Miraplacid Publisher : Registration Dialog

To continue using Miraplacid Publisher without registration, push Continue button.
To buy Miraplacid Publisher online, click on "Buy Online" button and follow instructions. As soon as you purchase the software, you will get your registration code by email. In the registration dialog type your Registration Name and Registration code. All these values are case-sensitive. Please these values exactly how you did it when you purchased the software. Then click Register button. Registration dialog will no longer show up.
Use exit button to quit.

See also: