PayPal API for PPV

Hello there!

I'm a bit confused about the PayPal API info. The information the plugin is asking for looks different than what I am able to get from PayPal. Also, the documentation link is not going to a page with any information I know how to use.

Additionally, I think PP may have updated some API/SDK stuff. There are many, and I'm not sure from which to pick.

Any help is appreciated. Thanks!