Error "Index was outside the bounds of the array" on re-opening a Query Builder (.tsm) query file. (4306670)

Create a query using query builder and it executes correctly.
Save the query.
On re-opening the query, the following error occurs.

Exception Information

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 Exception: System.IndexOutOfRangeException

Message : Index was outside the bounds of the array.

 Stack Trace: at Quest.Toad.QueryBuilder.QueryBuilderControl.LoadCriteriaGrid(XmlElement documentElement) at Quest.Toad.QueryBuilder.QueryBuilderControl.LoadQueryBuilder(XmlElement documentElement) at Quest.Toad.QueryBuilder.QueryBuilderControl.SetXml(String xml) at Quest.Toad.QueryBuilder.QueryBuilderControl.set_Xml(String value) at Quest.Toad.QueryBuilder.QueryBuilder.LoadModel(String file, String xml) at Quest.Toad.QueryBuilder.QueryBuilder.OpenFile(String file) at Quest.Toad.QueryBuilder.QueryBuilder.timerDelayFileLoad_Tick(Object sender, EventArgs e) at System.Windows.Forms.Timer.OnTick(EventArgs e) at System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)