Hi, that feature has gone (I think) because there was a conflict between KeyDefinitions and that option..
To disable "Go to fullscreen with double-click" just go to the KeyDefinitions options (Preferences->Key definitions & WinLIRC), select "Full screen switch" in the commands list and in the second field press backspace twice to clear (repeat the operation in the "Full screen mode" TAB).
Hope this could help you!!
