If you haven't moved the file where you accidentally put it in the wrong place, then you should move it, just to avoid confusion. I believe this a duplicate particle causing a crash, since most of the time, particles crash on startup. What's the filetypes? Are they .fhm, .fho, etc.? If not, contact the map creator for the fixed download. It may be that the map is very big, too, as maps with LOTS of meshes, etc. do that.