Solved (solved, but I want to know why it changed) Terrain shrunk and textures changed after update

Well, the titel explains the problems. The terrain shrunk from ~4000 to ~250 and the textures have changed AND the terrain has changed I have spent alot of time into this map and I hope I can do something to fix it.
It all happend after the 0.11. ~~ update.
Pictures of the problem:

And I can't open the world editor, game freezes. Please say I can open it after a hotfix or something, because if I can't, I've wasted over 50 hours of mapmaking..
(how the map was before the update: )

 

It took me 12s to open your map in the editor.

 

Beamng crashes when I try to open it in worldeditor, probably my pc sucjs, but I could do it in 0.10

 

RAM usage is also OK, so maybe it is problem, that you have plenty of files in levels, art and cache folders. In levels I have only my map with only a few files. Also file system has changed(especially folder structure and files in it) in 0.11

 

It worked in the newest hotfix. I can finall open the map but the terrain is still changed. I try to fix the terrain (altho its weird that its changed)

 

I think no one has this problem, so its probably on my end. I found the old .ter file but I have no idea how to use it.