Questions about Raspberry

Hi, I have a couple of doubts regarding the raspberry, I noticed that at the first start of the last card images, if I try to use the camera through aditof demo it works, but that the system updates give problems to the demo, after having done the update in fact I can't use it anymore. why?

Also I noticed that I cannot use the multiple camera on the image mounted by you. For our needs we need to alternate the two rooms (ToF and Pi). Is there a way to solve?