- Navigate to your ArcSite cloud account at https://user.arcsiteapp.com/
- Log in if requested
- Click on email address shown in top right corner
- Choose the Upgrade option from the drop down
- Click on the Manage button located in the center of one of the three columns. It will match your current subscription level (Professional, Premium or Preferred)
- Click Update button at center bottom
There you will have the ability to change the credit card info used during ArcSite billing.