PokerTracker

Does Notetracker automatically run when a new definition is added or do i need to purge and rerun ?

Same question applies for when an existing note is edited.

Thanks

You need to purge and re-run at this time. But NoteTracker does update whenever you're importing hands using Get Hands While Playing also so you don't need to worry about re-running it until it's completely full the same way you would worry about stats - it'll catch up as you go (though you might want to let it run a little while to get the most recent data).