At the bottom of every receipt (automatically sent by after each transaction) is a link that will take you directly to the AMW Pro subscription hub.

Following this link to access. Enter the same email used with signing up to AMW Pro and you will receive an email to access the Customer Hub.
Customer Hub
https://amw.thrivecart.com/updateinfo

Once inside you will be able to manage everything about your subscription
Cancel your subscription
Update your payment method
Access invoices