Hi Kurtnoise13,
first thx for your new mp4box GUI - its quite promising (the more the better) !
i guess your commandline should be:
mp4box -single 1 filename.mp4
TrackID = 1,2,3 ... n (or whatever the maximum number of mp4 tracks is) bond ?
IMHO there should be a general switch overhaul since some commands are dead/obsolete/double ...
http://gpac.sourceforge.net/auth_mp4box.php