It's most likely just a safe guard, to ensure that if anything loaded any data into memory, that it'll be cleared before starting (So something like a DirectX update, it wouldn't like old + new versions in memory at the same time, etc.)
Lo Tec, on 17 December 2012 - 05:18, said:
Lol! Isn't that one of those torrent specials? LMAO!
Uh, no. It's just the normal version of the game now.