To review and update your credit card details, you need to go to this link: https://account.mycommerce.com/ - Once here you will need to log in with either your user ID or your previous FusionReactor order number and password.
If you do not have your previous order number, please let us know and we can look it up for you.
If you did not set a password on your initial purchase, you will need to reset the password first before you can gain access to your account.