EMET 5.5 Unhandled Exception

When I right-click on the EMET icon (v5.5) and select "Open EMET", I get a "EMET Service status is: Not Running" dialog.  Retry simply redisplays the dialog.

If I select "Cancel", I get an unhandled exception dialog:

The stack trace is:

System.NullReferenceException: Object reference not set to an instance of an object.
   at GraphicalApp.MainForm.SystemStatusTL_CustomDrawNodeCell(Object sender, CustomDrawNodeCellEventArgs e)
   at DevExpress.XtraTreeList.TreeList.RaiseCustomDrawNodeCell(CustomDrawNodeCellEventArgs e)
   at DevExpress.XtraTreeList.Painter.TreeListPainter.DrawCell(CellInfo cell)
   at DevExpress.XtraTreeList.Painter.TreeListPainter.DrawCells(RowInfo ri)
   at DevExpress.XtraTreeList.Painter.TreeListPainter.DrawRow(TreeListDrawInfo e, RowInfo ri)
   at DevExpress.XtraTreeList.Painter.TreeListPainter.DrawRows()
   at DevExpress.XtraTreeList.Painter.TreeListPainter.DoDraw(TreeListViewInfo viewInfo, DXPaintEventArgs e)
   at DevExpress.XtraTreeList.TreeList.OnPaint(PaintEventArgs e)
   at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer)
   at System.Windows.Forms.Control.WmPaint(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at DevExpress.XtraEditors.Container.EditorContainer.WndProc(Message& m)
   at DevExpress.XtraTreeList.TreeList.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Let me know if you need further details (I wasn't permitted to upload images).

Pressing "Continue" seems to show the GUI, except with the System Status pane with a large cross in it.

Is EMET still working effectively?

Thanks.