Update:
Disconnect yea, clicking on System Settings does not open the system settings menu item
Okay, got it. Now to look for a solution.
Original comment (answered):
The click sequence to open System Settings is:
From desktop: (a) right-click on the screen, opening the dialog box @WetGeek's screen shot shows above, then (b) left-click on the System Settings menu item.
From the menu button (left button on taskbar, locks like a grid): (a) left-click on the menu button, then (b) left-click on the Systems Settings menu item.
When you do either/both, what happens?