when I got to runway 18L the new light system was not there.
I'm not sure if you really understood how they work. If you mean the THL (Takeoff Hold Lights), you are not supposed to see anything, unless there's an AI on the runway area from the THL position (see the map in the manual) up to the other end of the runway. If there's no AI on that area, there will be no lights displayed.
But why the change when every thing was fine
?? we haven't changed anything on the visibility ranges in this version.