Fundraising Advanced Payment Options Cheat Sheet?

I'm looking for information about how to set up the Advanced Payment Options portion of Fundraising.

After downloading and installing the plugin, I downloaded the documentation here: https://premium.wpmudev.org/wp-content/uploads/2012/03/Fundraiser-Usage-Doc.pdf

In the documentation, it gives a link to a "cheat sheet" on setting up a custom app on x.com. That link goes here: https://premium.wpmudev.org/forums/topic/xcommerce-application-process-marketpress-fundraiser

As you can see, all of the images that the post relied on have been taken down. Can someone fill me in on how to set up the x.com portion of this plugin properly? Instead of using x.com, can you use PayPal's https://developer.paypal.com ?

Thanks for the help!