Here's how you can update the card on file for your subscription plan, or make changes to your billing info:
First, login to your account online, then hover your cursor over your profile avatar (initials) in the top-right corner.
Next, click on your Name & Email in the dropdown menu that appears.
Click the Update Subscription button in the Manage Subscription section.
Click on Payment Methods.
To update the card on file for your subscription payments, click on Edit Payment Method.
Enter your new card number/billing info, and click the Update button.
You're all set! The new card will be stored immediately and billed moving forward for your subscription plan's future charges.