Volume level on Telenav 5.5.24?
 

Is there a registry setting or anything anywhere to adjust the volume level for voice directions in Telenav 5.5.24 (besides of course the volume on the device itself)? I've searched the Telenav forums and supposedly there's an "Audio" option under Preferences, but all my version has under there is an option to choose whether or not I want street names.