private void OnMakePatch( object sender, EventArgs e )
 {
   if ( lstCenRep.SelectedItems.Count < 1 ) return;
   string fn = _cenRepDir+@"\" +lstCenRep.SelectedItems[0].SubItems[0].Text+".txt";
   TCenRepParser cenRep = new TCenRepParser( fn );
   ofdOpenCenrep.DefaultExt = "txt";
   ofdOpenCenrep.FileName = lstCenRep.SelectedItems[0].SubItems[0].Text + ".txt";
   ofdOpenCenrep.InitialDirectory=@"C:\";
   if ( ofdOpenCenrep.ShowDialog() != DialogResult.OK ) return;
   XElement xPatch = cenRep.CreatePatch( ofdOpenCenrep.SafeFileName );
   plugin.Add( xPatch );
   plugin.Save();
 }