As of 27 October 2020, Vyond will have a new billing system. All related account management steps have been updated.
1) Log into the account and click Subscription under the dropdown menu on the top right:
2) Click on Manage Account:
3) From the top menu on the right, choose Payment Method:
4. Update the payment and click Save:
NOTE: For Professional subscriptions, only Administrators can update credit card and billing information.
See also: How do I change my billing information?