The Windows version of Hindenburg Journalist can from build 1560 and forward use Apple QuickTime for converting AAC (m4a) files. It can be downloaded free of charge from http://www.apple.com/quicktime/.
Where do I find a MP3 encoder?
Any LAME encoder for Audacity will work with Hindenburg Journalist, so If you already have one of those installed, you do not need to do anything further in order to be able to export MP3 files.
Download pages:
For Microsoft Windows: http://lame.buanzo.com.ar/
Optmized Apple OS X: http://www.thalictrum.com/
