No Paypal account is needed to purchase.

Paypal provides the option to pay directly by credit or debit card.

You don't require a PayPal account to purchase anything from Antibody Software via PayPal.

After clicking on the "Buy" or "Pay" button select the "Pay with a Bank Account or Credit Card" button as seen here.

If this option is not available in your country then you will have to create a Paypal account before you can purchase, if you don't already have one.