Beached II is shareware. If you decide to keep it, you should pay the registration fee. Once you have paid, you can click the ‘I Have Paid’ button in the ‘About Beached II‘ dialog box. All payments are handled by Kagi.
For more information see the Read Me file supplied with Beached II. The Read Me file contains information about payment methods, which include: Credit Card, First Virtual, Cash, and US Check. There should also be an application called Register. After reading the Read Me file, use Register to create a form for payment.