To change the payment card number, please follow the steps below.
1. Go to Settings after login.
2. Select Billing-> click Change Card or Change Credit Card
To change a card associated with your Paypal account, you can update or choose one card which is linked to your Paypal.
To change the payment method from a card to Paypal, from Paypal to a card, or from one Paypal account to another Paypal account, you need to cancel the automatic renewal of your subscription, wait for the current billing cycle to end, and then subscribe again with a new payment method.