For CDU Freeze during route insertion try mi solution in my topic CDU freeze solved. Many peoples with this problem tried it and seems to work I think that the problem is the calculation of performance with sid and star inserted.

Excellent thank you, it isn't freezing now. I was loading my sid/star/approach type straight after loading in the route. Edit Ahhhh maybe not, it froze again when I went to the legs page, Next time I'll make sure I only use the legs page if EVERYTHING else (performance wise) is set. I think I started playing around too much after it appeared to be stable. Edit2 Just did it a bit more careful this time and it hasn't frozen, thanks again :)