By default, you purchase a Pro subscription with a credit/ debit card. The renewal payment for the existing subscription will be charged from the card you initially paid with.
If you'd like to change the payment method to PayPal, login to your Your Web Design Studio Builder account, hover over the account settings and and click on Payment settings:
In the pop-up window switch to the PayPal tab and connect your PayPal account:
After that all new purchases and current subscription renewals will be done using the connected PayPal account. If you'd like to switch back to credit/ debit card payments, this can be done same way in the Payment settings.
If you are looking for the way to check the status of your Pro-subscription, check the article below: