Legitimate cracks (if such a thing exists) do not need you to turn off core system protections.
The is the holy grail for most players. It unlocks online racing against hundreds of real players. The official price is roughly $24 USD for a 3-year license or $48 for a lifetime license. Because the game has not had a major graphical update in years, many users feel the price is too high for an "old" game, leading to the demand for unlockers. lfs s2 unlocker 6r