Unhandled exception on Import

[UnBeatWater]

Error report:
See the end of this message for details on invoking \njust-in-time (JIT) debugging instead of this dialog box.\n\n************** Exception Text *************\nSystem.PlatformNotSupportedException: Operation is not supported on this platform.
at VTFEdit.CVTFEdit.SetVTFFile (VTFLib.CVTFFile VTFFile) [0x006d8] in <5171360439d041378fa6d6fbba48e202>:0
at VTFEdit.CVTFEdit.Import (System.String[] sFileNames) [0x00291] in <5171360439d041378fa6d6fbba48e202>:0
at VTFEdit.CVTFEdit.btnImport_Click (System.Object sender, System.EventArgs e) [0x0001a] in <5171360439d041378fa6d6fbba48e202>:0
at System.Windows.Forms.MenuItem.OnClick (System.EventArgs e) [0x00078] in :0
at System.Windows.Forms.MenuItem+MenuItemData.Execute () [0x0000b] in :0
at System.Windows.Forms.Command.Invoke () [0x0001c] in :0
at System.Windows.Forms.Command.DispatchID (System.Int32 id) [0x00014] in :0
at System.Windows.Forms.Control.WmCommand (System.Windows.Forms.Message& m) [0x00021] in :0
at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message& m) [0x00357] in :0
at System.Windows.Forms.ScrollableControl.WndProc (System.Windows.Forms.Message& m) [0x00043] in :0
at System.Windows.Forms.ContainerControl.WndProc (System.Windows.Forms.Message& m) [0x0001a] in :0
at System.Windows.Forms.Form.WndProc (System.Windows.Forms.Message& m) [0x00318] in :0
at VTFEdit.CVTFEdit.WndProc (System.Windows.Forms.Message& e) [0x00032] in <5171360439d041378fa6d6fbba48e202>:0
at System.Windows.Forms.Control+ControlNativeWindow.OnMessage (System.Windows.Forms.Message& m) [0x00001] in :0
at System.Windows.Forms.Control+ControlNativeWindow.WndProc (System.Windows.Forms.Message& m) [0x000b3] in :0
at System.Windows.Forms.NativeWindow.Callback (System.Windows.Forms.Message& m) [0x00025] in :0

\n************** Loaded Assemblies \nmscorlib\n Assembly Version: 4.0.0.0\n Win32 Version: 4.6.57.0\n CodeBase: file:///C:/windows/mono/mono-2.0/lib/mono/4.5/mscorlib.dll\n----------------------------------------\nVTFEdit\n Assembly Version: 0.0.0.0\n Win32 Version: 1.3.3\n CodeBase: file:///Z:/home/REDACTED/Documents/source/tools/vtfedit/VTFEdit.exe\n----------------------------------------\nmsvcm80\n Assembly Version: 8.0.50727.6195\n Win32 Version: 8.00.50727.6195\n CodeBase: file:///C:/windows/winsxs/amd64_microsoft.vc80.crt_1fc8b3b9a1e18e3b_8.0.50727.6195_none_deadbeef/msvcm80.dll\n----------------------------------------\nSystem.Windows.Forms\n Assembly Version: 4.0.0.0\n Win32 Version: 4.6.57.0\n CodeBase: file:///C:/windows/mono/mono-2.0/lib/mono/gac/System.Windows.Forms/4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll\n----------------------------------------\nSystem\n Assembly Version: 4.0.0.0\n Win32 Version: 4.6.57.0\n CodeBase: file:///C:/windows/mono/mono-2.0/lib/mono/gac/System/4.0.0.0__b77a5c561934e089/System.dll\n----------------------------------------\nSystem.Drawing\n Assembly Version: 4.0.0.0\n Win32 Version: 4.6.57.0\n CodeBase: file:///C:/windows/mono/mono-2.0/lib/mono/gac/System.Drawing/4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll\n----------------------------------------\nAccessibility\n Assembly Version: 4.0.0.0\n Win32 Version: \n CodeBase: file:///C:/windows/mono/mono-2.0/lib/mono/gac/Accessibility/4.0.0.0__b03f5f7f11d50a3a/Accessibility.dll\n----------------------------------------\nSystem.Configuration\n Assembly Version: 4.0.0.0\n Win32 Version: 4.6.57.0\n CodeBase: file:///C:/windows/mono/mono-2.0/lib/mono/gac/System.Configuration/4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll\n----------------------------------------\nI18N\n Assembly Version: 4.0.0.0\n Win32 Version: 4.0.0.0\n CodeBase: file:///C:/windows/mono/mono-2.0/lib/mono/gac/I18N/4.0.0.0__0738eb9f132ed756/I18N.dll\n----------------------------------------\nI18N.West\n Assembly Version: 4.0.0.0\n Win32 Version: 4.0.0.0\n CodeBase: file:///C:/windows/mono/mono-2.0/lib/mono/gac/I18N.West/4.0.0.0__0738eb9f132ed756/I18N.West.dll\n----------------------------------------\n\n JIT Debugging **************\n