You can save several cards in your LiveXP "Transaction history" and switch between them.

If you want to change the card you have, delete it and save another instead.
1. Click on your photo in the upper-right corner of the screen
2. Choose "Transaction history" > "Payment settings"
3. Delete the card from the "Payment method"
4. When you make a purchase next time, enter new credit card details and check the "Save this card for easy payments" box.

If you wish to change your current payment method for subscription renewal, cancel your active subscription through your account settings. After cancellation, your subscription will be deleted after three unsuccessful automatic renewal attempts. Then, you can purchase a new subscription with new payment method.