If you are playing on a multiplayer server, you usually need a specific mod setup to join. Servers often run custom anti-cheat scripts and unique ship packs. A mod manager ensures that you are running the exact version the server requires, preventing "kicked for cheating" errors caused by a single mismatched file.

If you are looking to get into the modern Freelancer scene, here is the best approach:

Good mod managers can read the scripts inside mod files. If you try to activate two mods that change the same values, the manager will warn you of a script conflict before you even launch the game. It saves you hours of troubleshooting "why is my game crashing on startup?"