Set the Plays ("Play Count" before iTunes v9.2) of the selected tracks to a user-entered number (they will all be set to the same number). If this number is 0 then the Last Played date of each track will be erased. (iTunes has the ability to "Reset Plays" to 0 from a track's contextual menu.)
Also see New Last Played Date and Add or Subtract Play Count.
App displays files in iTunes Media folder which are not in iTunes library
Edit tags of stream URL tracks
Remove iTunes tracks disassociated from files
Juxtapose text in Artist tag such that "Ellington, Duke" becomes "Duke Ellington"
Set the Plays of selected tracks.
Update subscriptions which have expired by virtue of being ignored for five or more days