Moe from what I recall. Take the door panel off or at least undo some of the clips so you can lift it up a bit. There is an access hole on the inside of the door frame. I cant recall if you will see the hex bolt straight away or whether you have to wind the window until it is exposed but I pretty sure you can adjust the bolt so the actuating arms stop against the bolt depending whether it is against the flat or the point of the hex. also I note there is another hole next to it which may be another position you could move the bolt to for another range of adjustment. I have taken a photo of a spare winder mechanism I have. You can see the bolt I am talking about next to the toothed gear.
GB