All output is 4KB files
I downloaded the free version of Switch for Mac - version number is v1.40
My hardware is imac 2GHZ Intel Core Duo running MAC OSX - Leopard version 10.5.5
I first ran Switch on its default settings to convert a 3.3MB .wma file which has loud bits and quiet bits to AIFF to run in iTunes. The result was an AIFF file of 36.2MB and the quiet bits did not seem to come through. So I adjusted the rate from 96 to 192 and it hasn't worked since.
All the output files are 4KB in whatever format - AIFF or AIF or MP3 and they don't play. It is possible to Play the source file in Switch.
I've deleted Switch and then been back to the site and re-downloaded, re-installed and re-run and it's still only 4KB output.
Hope this information helps to find a fix.