With SteamVr open, and Orbus opened from within the SteamVr home, Orbus opens the standalone application and does not hook into steamvr.
As a side effect, this means that both steam home is running and orbus. While this is not necessarily an issue since you can choose orbus from Oculus Dash to view that Vr application it does provide an issue when wanting to screenshot within the game since the oculus controls do not support screenshotting of any proportion.
I imagine this issue is due to the standalone for oculus overriding the menu button on the left controller that is used specifically for the steamvr menu.