CIQ Simulator - buttons cannot be clicked

I have just installed visual studio, monkey C and SDK / CIQ Simulator. Monkey C works fine, I can compile the standard new Device app which opens in the simulator.

When I try to click a button in the simulator the mouse arrow does not change nor allow to click. I do not find any setting to enable buttons.

Please let me know what I can do, to test the buttons in the CIQ Simulator. Thank you in advance.