If you load your game, then you load the utility, then you load the game without specifying a file name and when you edit the changes appear immediately in the game if you redisplay the player stats page, it is a real time editor.
If you load the utility and then select a file name to load and you edit and save and nothing appears in your game until you load the saved game then it is a saved game editor.
Incidentally, as far as I am aware the editor works if you turn off virus checkers, not the firewall. Even if you turned off your firewall it is possible if not desirable to get on to the internet.