I want to import a program from the toolbox, but the toolbox on the right of Automation Studio is gone. I can't find it anywhere. How do I enable it?

I want to import a program from the toolbox, but the toolbox on the right of Automation Studio is gone. I can't find it anywhere. How do I enable it?

I would say you are doing everything right and the Toolbox pane is there - I can see it (there is a small grey dot there).
You just need to drag the pane separator.
When disaster strikes you always have the capability of restoring the default window layout from Window -> Reset Window Layout