Instructions to enable Steam transport in Unity editor:

1. Go to MainMenuScene
2. Select NetworkManager in hierarchy
3. Enable "Use Steam" in MyNetworkManager, the FizzySteamworks component, and the SteamManager component
4. Set Transport to the FizzySteamworks transport
5. Disable the TelepathyTransport component

(To test in editor, you must have Steam running and be logged in. You can use the Steam client or SteamCMD.)