The MTX tool is vital for managing car classes. Many mods crash the game because their "Class ID" conflicts with another car. Using MTX to reassign IDs is the #1 way to fix "Crash on Startup" issues. WR2 Manager

To ensure these mods run without crashing, players often use specific technical workarounds: Veiledning :: Adding mods without Steam Workshop

This led to the . Veteran modders began re-uploading stable versions, converting models from Test Drive Unlimited and Forza Motorsport , and releasing "fixed packs" that address: