How to dismount a window handle
Start by opening the window to its correct position.
Release the handle
Do not activate the friction brake when you are dismounting the handle. Insert a 3mm mandrel or screwdriver into the hole in the cover in order to release the handle from the console.
Remove the console
The hole may be located on the underside of the cover on, for instance, top-guided windows. Release the handle from the console with a jerk. Use a thin putty knife or similar to protect the wood when you remove the cover from the window sash. Lift the cover free using a small screwdriver; you can then remove the console without any problems. Then unscrew the two screws and remove the console from the window sash.