Cindy - Quick question: I know the module no longer uses the IPN Hander. My question is, if we do set an IPN Handler in PayPal (under the Settings --> Notifications), would that interfere with the module in any way?

I ask because we are developing a product (completely separate from ZenCart but run on our same server), and this other product uses a PayPal button that relies on PayPal to post back to the IPN handler for that program.

So if we put the URL for that other program into our PayPal IPN settings, would that somehow cause our ZenCart store (using the PayPal RESTFUL api) to stop processing the orders?