Still cannot make case conversion code working.
Cannot save a preset with this error:
System.NullReferenceException: Object reference not set to an instance of an object.
at MusicBeePlugin.AdvancedSearchAndReplaceCommand.Preset..ctor(Preset originalPreset, String presetNameSuffix, Boolean copyGuidIfsuffixAbsent)
at MusicBeePlugin.MultipleSearchReplaceCommand.saveButton_Click(Object sender, EventArgs e)
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.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)