Link OS v2.15.2634 - Only TCP

I'm wondering what's happened to any USB or Bluetooth objects in v2.15.2634 of Link OS?

I've installed the nuget package into Visual 2017 and all I see are TCP objects. TCPConnection, TCPDiscoverer are in there but nothing for USB or bluetooth.

I'm trying to develop a UWP app and visual studio won't let me install earlier versions of the sdk.