Could not load index file

Update Edit:

Give up with latest build. Reverted to Old Build Version 1.0.0.0 - no problems.

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I just upgraded to 1.0.5.11

I get this error message upon first time I open AL
I try to synchronise the library, but I still get this error manifest:

************** Exception Text **************
System.ArgumentException: Item has already been added. Key in dictionary: 'd:\1 my poser 6 only assorted runtimes\p6 ex-env\runtime\libraries\props\miki stuff\! miki1020' Key being added: 'd:\1 my poser 6 only assorted runtimes\p6 ex-env\runtime\libraries\props\miki stuff\! miki1020'
at System.Collections.Hashtable.Insert(Object key, Object nvalue, Boolean add)
at System.Collections.Hashtable.Add(Object key, Object value)
at Advanced_Library.FileIndexer..ctor(XmlDocument xml)
at Advanced_Library.Form1.CreateOrUpdateIndex()
at Advanced_Library.Form1.synchronizeLibraryToolStripMenuItem_Click(Object sender, EventArgs e)
at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, 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.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)
at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
at System.Windows.Forms.ToolStrip.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.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ToolStrip.WndProc(Message& m)
at System.Windows.Forms.MenuStrip.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

************** Loaded Assemblies **************
mscorlib
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.42 (RTM.050727-4200)
CodeBase: file:///C:/WINDOWS/Microsoft.NET/Framework/v2.0.50727/mscorlib.dll
----------------------------------------
Advanced_Library
Assembly Version: 1.0.5.11
Win32 Version: 1.0.5.11
CodeBase:

EDITED