Any changes made to the information related to a track (Cover Art, Stripe, Loop, Cuepoints and tag fields like the artist name, title, genre) will automatically be stored, provided that the track has been previously imported to TRAKTOR's Track Collection. To modify the track information, right-click on Track Collection in the TRAKTOR Browser and choose Edit in the drop-down menu.
Note: These changes will also show up in iTunes and in the iTunes node in the TRAKTOR browser. Note that you will have to play back the track in iTunes once in order to see the updated information in iTunes and the iTunes node in the TRAKTOR Browser.