About Old Encryption

It seems like it has been broken, but if you still want to use it, here are all the versions prepared so far:

• Old and very basic encryptor with Custom Showroom support: download (has been broken for sure, CM is an open source app after all);
• Old encryptor without showroom support: download (faster in-game, but doesn’t defend against Ninja Ripper);
• Newer, v3: download (Ninja Ripper protection can be circumvented);
• Newer, v5: download (better protecting against Ninja Ripper, requires car LODs, server lock can be circumvented);
• Newer, v6: download (doesn’t require car LODs).

Full documentation is available here. As for LODs requirement, please consider adding LODs to your cars, CM with Polygon Cruncher can generate those for you. They can massively improve in-game performance if you have more than a single car on a track!