Why do I only have one sensor?

In the list of sensors in the never version of MIT appinventor I find only one sensor and in particular accelerometersensor. I see from the tutorials that there should be more but I only have that one. I am particularly interested in the QR code scanner. Can anyone help me?
M.A.

Set you Blocks Toolkit to Default in Project Properties

Not surprisingly, I was set to “beginner”. Thanks for your help!?