Exception when saving MSC files

[nwrolson]

The following exception occurs whenever one tries to save an MSC file:

System.InvalidCastException: Specified cast is not valid.
at SALT.Scripting.MSC.MSCCommand.GetBytes(Endianness endian)
at SALT.Scripting.MSC.MSCScript.GetBytes(Endianness endian)
at SALT.Scripting.MSC.MSCFile.GetBytes(Endianness endian)
at SALT.Scripting.MSC.MSCFile.Export(String path, Endianness endian)
at Sm4shCommand.AcmdMain.saveToolStripMenuItem_Click(Object sender, EventArgs e)
at System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e)
at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
at System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ToolStrip.WndProc(Message& m)
at System.Windows.Forms.ToolStripDropDown.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Hope this is an easy fix, and thanks for the great tool @Sammi-Husky !