LayOut 2017: Instructor window missing



I have SU pro 2017 on latest mac OS. I am unable to see the “Instructor” window. I have toggled “Instructor” in the “window” file menu several times but nothing appears. I have minimised all my other windows so its not hidden behind any thing else.

As a check, I opened the 2016 version and the instructor window was visible! For now I will use 2016, but would appreciate someones help to make this work in 2017, thanks