>>> http://i.imgur.com/BUTuZcH.png(1) set the target level,
(2) drop your files onto the [Batch Auto-gain button] and confirm that the files will be overwritten,
(3) check the results.
And here are the 'before' and 'after' waveforms and loudness levels in MMultiAnalyzer.
>>> http://i.imgur.com/gWeP2Ss.pngCheck the orange line in particular - running very close to 0 LU.
