Movavi Support

1) In the rightmost column of the file list, click the audio track information box. The audio track list will appear.

2) Choose audio tracks

In the box with the audio tracks, deselect the audio tracks that you don't want to appear in the output video. If you want to completely remove audio from the file, select the No Audio option.

Please note that the software does not add the external audio tracks or voice-overs. 

To do that, you might want to try Movavi Video Editor. 

3: Apply changes

Click Apply in the audio track box to accept the changes. Now, when you convert the videos, the output file will contain just the tracks you've selected.

Note: not all formats support multiple audio tracks. The table below shows the maximum number of audio tracks for each format: