If you mistakenly once select any of the "calibrate" in Oculus settings, you must run through the setup. Even if you kill the app and relaunch it, you are back in the calibration vie and no access to library or settings etc.
I have black screen now since last Oculus and Nvidia updates (don't know which one did it today as I updated both) and get just orange light. I mistakenly clicked "calibrate floor height" and I can't get back to library etc anyway as Oculus just forces me to "continue in your headset" what is very nice when your screens are black....