You can change the payment method of your Jitter Pro subscription at any time. To do so:
Click Manage billing from your account page,
Click the Add payment method setting,
Enter the new credit or debit card details in the fields provided and confirm,
Optionally, you can delete the older payment method.
Jitter will use these payment details for your next subscription payment and onward. You can only pay for a Jitter Pro subscription with a credit card or a debit card that supports online transactions.