This is not an update for the Paypal App or a replacement for it. It is a standalone payment module for Paypal Standard with IPN, designed to be used with new installations of Phoenix from 220.127.116.11 onwards which do not include the Paypal App.
In the checkout flow for Paypal Standard, the customer leaves your site on confirmation, logs into Paypal, makes the payment and then is returned to your site. The module uses the usual Phoenix checkout processing so will be compatible with standard configuration of notifications and addons which affect stock tallying etc
1.00 initial release tested up to 18.104.22.168