How do I enable USPS calculated shipping?

I'm following your MarketPress Tutorial Part 7 (https://www.youtube.com/watch?v=_orhNC-E08I). When I get to the part about the USPS calculated shipping, all I see is FedEx and UPS beta options. I need USPS and it is not present with my MarketPress as it is in the video :disappointed: Please help.