It is a audio plugin. When you download it, it adds a n audio section to your dashboard. Go to the audio section and add some audio in.
I will get a better description up. You can also look at screenshots to get an idea of what the plugin is.
This problem has been fixed in version 0.3
OK, so after you upload an mp3 file and attach it to the audio page, then what else? Nothing says what to do with it and how a visitor to the site gets to hear it.
Please post this in a different topic, and then I will reply.
I just updated to version 0.4. This has more information.