had to reinstall MSTS after half of tokyo-hakone disappeared

!? i made my own route (which i have backed up elsewhere) and tried to get into route editor to do some more on it, but it just gets an error even though it says loading finished! even when it does load its just a sea of white and then it crashes.
maybe copying my back up into the route folder will make it work? i dont know, you tell me?
PS ive tried installing the updates i installed before again, still doesn't work, plus i recently installed the london-brighton route, if that changes anything...