This method or way looks very familiar to kind of "recreating or cleaning" your cache files. What I mean, is its somewhat similair to what it does.
I'm gonna investigate my game a little more before trying this. I'm doing this because I attempted to play one of my older game files (hadn't played it since April 2013) last night, and it totally bugged out. So, I think I'll launch it one more time and see what happens then I'll do a factory reset.
I'll be sure to backup my computer to time machine so if it goes, as my mammaw calls it, "KAPOOIEE!"
Thanks for writing this up!