Hi Aart,
Strange. Maybe something to do with too sensitive contacts in your mouse-buttons? (because it's normal to get these yellow squares when you click on a waypoint).
Roel
I understand it when I dubbelclick (or use the right mouseclick) on a waypoint I see the properties and then the selected waypoint gets a yellow square. But how to wipe it out again?
Have you tried to just click somewhere else on the map (not on a waypoint or other point). That should do the trick and make the yellow square disappear.
(gewoon ergens anders op de kaart weer een muisklik geven)