In order to add a new credit card to your account from Spotlightr's interface, you should follow these simple steps:
Click on Account & Billing in the bottom left corner:
Then click on Change Plan:
Then click on the current payment method and you will see the option to Add New Card:
What if my license is expired? How can I update my card and settle my past due payment?
If your license has expired then you are unable to access the Billing section in your account. However, you should be prompted to add a new Credit Card from the login screen when you try to log in.
How do I delete old cards?
If you have an old card you want to remove from the system then please contact the helpdesk.