I have Fab Player v2.5.00 for Mac. Your prefix selection doesn't have a selection for this Mac version so I will post my problems here as they were the same in v2.4.00 version. None of the settings that are made (Brightness, contrast, etc.) stay. Every time the App. is started they have to be set all over again. My Windows version doesn't have that problem. Also when playing back a MKV file with chapters, if I skip ahead chapters the sound becomes garbled. My windows version doesn't do that either. The Mac version of this software seems to be deficient. Is there anyway that it can be fixed?