The problem is this, the game runs vanilla fine, but after 800+ hours it's time for some mods. I have been using NMM for Skyrim, SSE, and Fallout 3 for a while now, and I use LOOT for keeping things in order. I have NVSE and 20 other mods for NV. When starting the NVSE loader, I get the message "cannot find FalloutNV.exe". After checking the game file through the usual path, I find FalloutNV.exe is just plain gone. I searched Local Disk with no luck. I have all this in a Steam acct. so I re-installed the game, with the same result. Is it possible to reacquire the file and, if so, how? I did check their forums and left a post, but I don't have much confidence there.