Ah alright, I just uploaded a new v2 build with some tutorial fixes and there should be no more discord opening bullshit. I regret integrating that.
I would think that's the VR support triggering it. Normally in steam we use -nohmd as a default launch option unless people select VR, but in the demo it's just running the .exe directly. I don't have my VR installed on this pc right now so i didn't notice that it was launching steamvr on the demo. You can launch the .exe with -nohmd and it will not start steamvr, i will figure out how to fix this for a next version.