Installing PayPal as a payment method

I've been reading a tutorial on how to setup PayPay as a payment method on NopCommerce v3.60. The Auto-Return and IPN handler should be set to the below.

Auto-return: http://www.yourStore.com/Plugins/PaymentPayPalStandard/PDTHandler
IPN handler: http://www.yourStore.com/Plugins/PaymentPayPalStandard/IPNHandler

There's no file or folder called PDTHandler and IPNHandler on the NopCommerce folder.

I have a folder called http://www.yourStore.com/Plugins/Payments.PayPalStandard/Views/PaymentPayPalStandard with 2 files Configure.cshtml and PaymentInfo.cshtml

nopCommerce uses MVC so urls don't tend to map to specific static files, they map to routes which map to methods defined in a controller. If you've got the source code version of the plugin you can see the routes in the RouteProvider.cs file and their associated methods in the PaymentPayPalStandardController.cs file.

These get compiled into the Nop.Plugin.Payments.PayPalStandard.dll which you should see in the deployed version of the plugin. If you've got the plugin installed the urls you mention above should be available to respond to requests.