You have to enter it into a command window. Just hit [WIN]+[r], enter "cmd" and OK. Navigate to your your game path with the above mentioned exe.
If you down't know how to navigate with your keyboard in a command window, better try this:
In a explorer window navigate to your game folder with the above mentioned exe.
While pressing [Shift] key, press right mouse button on that folder name.
Chose "Open PowerShell here" or similiar in your language.
In PowerShell you have to add ".\"
So enter
.\blueRibbon.exe -force-gfx-direct
and hit [Enter]