Can't Export Audio only version 18.01

I selected the Audio Only setting and it of course unchecks the export video. I select mp3 format and select a filename. However it always exports to a .mov file! Yes, yes, the export video is turned off!

Just make sure that in the audio settings on the render page both Format and Codec say MP3. You can also just change the suffix of the rendered file from mov to mp3 and all will be well. The same goes for wav files.

Thank you. Yes the problem was the codec was MP3 but the format defaulted to Quicktime.