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 your donor account.
Once you log in, you can follow these steps:
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. If the organization has enabled bank transfers on their end, you'll also be able to switch from card payments to bank transfers, and vice versa.
Once that's done, you're all set!