How to turn on / off live updating for all smart playlists at once?

Question

Hello.  Is there a way to turn live updating on or off for all my smart playlists at once?  That would be a fantastic feature since too many smart playlists with live updating turned on brings iTunes to a crawl. 
Currently, I run iTunes on Windows 7.  I have over 40,000 songs, and I have hundreds of smart playlists to help organize all my songs and what's on my various iPods at any time.  The problem with having so many smart playlists is that iTunes runs very slow.  One thing that I do to make iTunes run slightly faster is to turn off live updating for as many smart playlists as I can stand (by going into each one and editing), but then it's hard to tell which have live updating turned on and which don't.  As a result, many of my smart playlists don't get updated when I would like them to because I have to go in and manually edit each one again to turn it back on.  Maybe showing which have live updating turned on or off would be useful, too? 
On a related note, my iPod Classic will actually not work when I sync too many smart playlists.  This has been a long-standing problem with iPods, and I'm surprised that it hasn't been fixed yet.  I have not experimented to see if it makes any difference if the smart playlists have live updating turned on or off. 
Thanks.

Answer 1

this is exactly what i was hoping to see -- but i can't get it to run right on iTunes 12, yosemite
it also doesn't seem to recognize "Home Videos" or "Audiobooks" as special and tries to turn them off -- i modified the earlier script to add those two to the lists of exclusions, but still get the same error message on the first "unspecial/real" smart playlist -- hasn't somethign changed in the object model perhaps?
thank you muchly!
=mjb
tell application "iTunes"
activate
  set allPlaylists to (get every user playlist)
  repeat with thisPlaylist in allPlaylists
  if (thisPlaylist is smart) and name of thisPlaylist is not in {"Music", "Movies", "Podcasts", "Books", "TV Shows", "iTunes U", "Apps", "Ping", "iTunes DJ", "Genius", "Home Videos", "Audiobooks"} then
  set view of browser window 1 to thisPlaylist
  tell application "System Events"
  tell process "iTunes"
  tell menu bar 1
  tell menu bar item "File"
  tell menu "File"
  click menu item "Edit Smart Playlist"
  end tell
  end tell
  end tell
  set theCheckbox to checkbox "Live updating" of window 1
  tell theCheckbox
  if (its value as boolean) then click theCheckbox
  end tell
  click button "OK" of window 1
  end tell
  end tell
  end if
  end repeat
end tell