This script will reset the Start and (optionally) the Stop Time of the selected tracks--or all the tracks of the selected playlist--to "0:00" and (optionally) their entire duration, respectively.
You might also be interested in Batch Trim Start or Stop Time (Seconds).
Choose to reset the tracks Start Time to 0:00 and, optionally, the Stop Time to the full duration of the track
Advance or rewind the currently playing track an entered number of seconds
Create text file listing tracks common to and exclusive to two playlists
Renumber order of selected tracks
Set choice of various number tags of selected tracks incrementally
Add or subtract a user-entered number from each selected track's Plays
Perform search-and-replace on text in your choice of tags