You can easily find the one you want since the track numbers and names are listed. Or you can choose a specific individual track or return track.'Selected Tracks' only renders all tracks that were selected before opening the export dialogue.That includes all MIDI and audio tracks as well as return tracks. 'All Individual Tracks' will render each single track to separate audio files.If you want to export the mixdown of the song, choose 'Master'.When exporting from Session View you need to enter the desired Length in bars, beats and 16th as well as render start (the default is 1.1.1).Choose 'Export Audio/Video' from the File Menu or use the shortcut SHIFT + Ctrl + R (Windows) or SHIFT + Cmd + R (Mac).So make sure that all clips you want to export are launched first as well as mute unwanted tracks or press the clip stop button for these tracks. Tracks that are still active in Arrangement View (not greyed out) will also be rendered in. When exporting Session View clips, only clips with activated clip launch buttons are rendered.Click Save and the rendering process will start. You can now choose the location to which the audio file(s) will be saved.Choose your preferred rendering options (details below), then click OK.
You can listen to the song once more to ensure it's all good. Also make sure that no clips in Session View are launched as they'd be rendered into it as well.
This is why it can be confusing at first and you might end up with unexpected results or even silence. Since there are two views in Ableton Live, you can export audio from both the Session and Arrangement View, or even a combination of both.