To update your user information in ThriveCart, you may need to go to this link and follow the following instructions:
Input your account email address.
Click the 'Send me my link' button.
Check your inbox. You will receive an email with the subject "Update info/view purchase history"
Click the link "Click here to update your info or view your purchase history"
It will redirect you to your profile where you can manage your information including your payment details.