For additional troubleshooting, I installed it via Parallels to a shared folder in OS X, when I try to run the CustomsForgeSongManager.exe via mono, I get this error. I hope someday you come out with a OSX version, but I know it is a small number of users. Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly 'System.Deployment, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. File name: 'System.Deployment, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' at CustomsForgeManager.Program.RunApp () <0x75de80 + 0x00023> in <filename unknown>:0 at CustomsForgeManager.Program.Main () <0x752ed8 + 0x001f3> in <filename unknown>:0 [ERROR] FATAL UNHANDLED EXCEPTION: System.IO.FileNotFoundException: Could not load file or assembly 'System.Deployment, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. File name: 'System.Deployment, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' at CustomsForgeManager.Program.RunApp () <0x75de80 + 0x00023> in <filename unknown>:0 at CustomsForgeManager.Program.Main () <0x752ed8 + 0x001f3> in <filename unknown>:0