When i ran the program it did change the settings in that plist. Looking through it a bit more it also seems to load and unload the necessary launch daemon so that does save you logging out and logging back in again I suppose.
Great that you guys like it, but I don't use it as a prefer the 1 hour back up. And after I download music, I use the new 10.5.2 time machine menu feature to do a force back up.