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
Batch merge and/or delete playlists
Copy selected CD's CD Text to the clipboard
Send current song info to clipboard
Export artwork of selected tracks to parent or specified folder
Change video kind and video related tags of selected video tracks
Sort purchased tracks into discrete playlists by name or account ID