i've had no problems with this at all .. except that it's ability to handle wma's is limited by ffmpeg's ability. switch is not without its own problems, free or not.

ditto on bitnix's remark. you could also try max instead, it does more and it is free. plus, the one license per machine is just a bit restrictive.

I bought this 3 years ago and in all honesty, I would say, stay away from this app.

It's been nothing but smoothly operating, with unsuspected crashes and flaky behavior when doing even the simplest conversions.

I suggest Switch Sound Converter instead: http://www.nch.com.au/switch/