To edit your recurring donation as a donor, go to donorbox.org and log in to your donor account by clicking the Donor Login link at the top of the page. If you didn't set up your account via the setup email, please use the Retrieve My Account link. This will allow you to establish a donor account.
You will then have access to your recurring donation plans. Click the Edit button to the right of the donation plan that you wish to edit (see image below).
To change your payment information, click the Update Payment Method link.
Enter your new payment information, and click Update Card. Once that's done, you're all set!