To update the payment details for your Loopcloud subscription, go to the Loopcloud My Account page here: https://www.loopcloud.com/cloud/myaccount and then select Change Payment Information under the Manage Subscription section (as highlighted below):
You will then be taken to a page to update your payment method. From here, please enter your new details, and then click 'Confirm'.
If you have any further questions about connecting Loopcloud to your DAW, please click here to contact our Customer Care Team - we'd be more than happy to help!