Hi! Yep... meanwhile I update it to unreal .26 (which is still in beta but it's the only one that accepts the new HP G2 controllers map), doing that will allow you to mess around inside the app. It's not the perfect solution, I know, and sorry about that.
Also, you could remap controllers in SteamVR to match the actions just for this app.
Thanx and have a good time measuring your virtual experience. []-)