Can't open the map

I'm so sorry for my poorer English.

I've a problem while I open my map in Editor and the Game.
Yesterday when I'm expanding the map, my computer suddenly reboot and I can't open my map just like the following image.



What can I do in this situation, I don't want to give up this map because it is a big map and I used many time to create it......

Please help......


Some image which are the suburbs.

^Marx Bahnhofsnahe Busses

^Daitungdorf Weg

^Nieder-Daitungdorf

^Daitungdorf Weg panoramic view

^Kutungdorf, and the Highway to Airport