Not entirely sure what my options are at this point -- I'm at the point where I've executed a full de-install of the game; including deletion of the steam common KSP folder, with subsequent reboot. I am curious if there are any other file cache or folder locations outside of steam->common (other games have used My Documents, or home/temp, etc. KSP: v1.0.4.861 Windows 32bit Windows: Windows7 64-bit Service Pack 1 Problem: Running app yields a crash at "Module Manager" Mods installed: ModuleManager.2.6.7.dll <That's it! - only the default install Squad folder sits in gamedata> Tailing the output_log file yields one clue -- that the module manager might be erroring on a sharing violation of the running ksp executable ?!? That or is there an expectation of ModuleManager to have a configuration or other file, or a run time parameter to the ksp executable I may be missing? The master folder in steam common has read-only de-ticked, with subfolders inheriting the allowance. I am also unable to turn off DEP for the KSP.exe or launcher.exe -- windows informs me it is not allowable for me to turn DEP off. -=-=-=-=- IOException: Sharing violation on path G:\SteamLibrary\steamapps\common\Kerbal Space Program\KSP.exe at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, Boolean anonymous, FileOptions options) [0x00000] in <filename unknown>:0 at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share) [0x00000] in <filename unknown>:0 at System.IO.File.Open (System.String path, FileMode mode, FileAccess access) [0x00000] in <filename unknown>:0 at ModuleManager.MMPatchLoader.FileSHA (System.String filename) [0x00000] in <filename unknown>:0 at ModuleManager.MMPatchLoader.PrePatchInit () [0x00000] in <filename unknown>:0 at ModuleManager.MMPatchLoader+<ProcessPatch>c__Iterator0.MoveNext () [0x00000] in <filename unknown>:0 (Filename: Line: -1)