Thanks for registering your copy of Audio File Cleanup. It's all done securely through Paypal whether you use your own Paypal account or a credit card. The registration fee for Audio File Cleanup 3.0 is USD $12.

To register, just click on the Pay Now button. This will take you to Paypal's secure payment site. Once you've made your payment, a registration code will be emailed to you; the next time you start Audio File Cleanup and see the registration dialog, just click "I have a registration code" and paste in the code.