Openhab extension not working

Hi guys,
i have question. I installed VS Code 1.32.3.
I added the working space folder which is connected as network drive openhab-conf
Thereafter i installed the openhab extension.
The icon for openhab appeared.

First problem is when i open the setting to set up the user.setting via the settings.json the file looks empty.
just assigned

    "workbench.iconTheme": null

when i make mouseover to the openhab icon it dissapears !

I also get this blue icon file theme button.
I never saw this in the tutorials videos on youtube.

What i am doing wrong ?