If you want to update your billing / payment information you can do so by visiting the Subscription page.
You can add/update your credit card:
Simply authorize the new credit card and your next payment will come from that card.
ClickGUARD does not store your credit card details other than card type (e.g. "MasterCard"), expiration date and the last 4 digits of the card number for identification purposes.
You can also update your billing information: