Hi - I've not heard of this problem happening before and it's hard for me to know why from here. Is it a particularly large route with lots of points? Is it just happneing with one particular route you are edting? If you can tell me how to recreate the problem I can try to see if it happens for me here.
Prior to saving an exsisting route that I have replotted as a new route, when I hit the Reduce Points button the new route becomes a mass of circles and Plotaroute locks up. I then have to shut it down to free up the my computer! Why is this happening?