I have encontered the same problem, DCS 2.5 crashes everytime when runing on the Neveda map. I am now trying your method to repair the map, but the Torrenting rate from server is SO slow, it is down to 20-40 KB/S, and the 31GB of NTTR map is going to take 5-6 DAYS to complete the download / "repair" !
There is got to be a better way to do this "repairs" of DCS. Considering how much time we have already spent on downloading the maps, modules, hot fixes...and how much time we ARE going to waste on downloading when F/A -18 and F-14, etc come out...It has just made DCS a waiting game ;).