To access and update your card on file, navigate to your account page by selecting the 'My Account' link at https://billing.crossclave.com/ after logging in. From there you will be able to see a Dashboard table with several options listed. Select the 'Account details' link to update the card information on file. Choose the 'Add payment method' button and then enter the information for the new card. Select 'Save Address' to confirm the information. Choose the button again after entering the information to save the new card to your account.