Vive Controller not showing up anymore, tried everything, need help

So I got into Unity VR (Vive) yesterday and played around a little, watched some tutorials and everything worked more than perfectly.

Suddenly today the Controller (left) doesn't show up anymore. (http://i.imgur.com/8tNDApB.png - Hierarchy during Play mode)

What's happening is that when I enter playmode, Unity should assign an index to each Controller (Like this on the Controller (right): http://i.imgur.com/REgVgOh.png)(This is Left:...

Vive Controller not showing up anymore, tried everything, need help