To update your payment method in Frame Set, first log in and open your Account settings page by clicking on the profile icon in the upper right-hand corner. Scroll down and click "Settings". From there, select "Manage subscription" and then click on "Update payment method". This will take you to a secure billing page. Click the "Add payment method" button to add a new card. Once your new card has been added, you can remove any previously used credit cards.