How to update your card on file for your Cashier Live Subscription:
Login with your Administrator email. This login will be in an email format and was used to create the account.
2. You should land on the Administrator Settings and Manage Store screen. If you are taken into a register, just click on the Settings button on the bottom right.
3. Select "Billing Plan" on the left side bar.
4. Fill out all fields and press the orange Update Billing button on the bottom.