[Gmsh] Need help with Gmsh

[Надворский Назарий]

Hello,
I am a freshman in gmsh, I just started learn it and as my prep I decided to do this tutorial: https://www.austingurley.com/conc/cae/tutorials/ (first tutorial). 
I found myself with some problems with Gmsh, as I showed at screenshots: http://screenshot.ru/7555166b8ec090c986e47c25bcbc73a4 and I don't know what should I do next. When I creat geometry, I can't to add points. Thanks for your help.
I am awaiting for answer,
Nazarii