Because locking techniques evolve, different tools are required depending on the encryption used:
SCS Unlocker to open and edit locked Euro Truck Simulator 2 (ETS2)
By default, many ETS2 mods are essentially renamed .zip archives that can be opened with standard software like 7-Zip or WinRAR. However, some modders use encryption or "obfuscation" techniques to "lock" their work.
SCS Unlocker for Locked Mods is a niche, third-party utility designed to bypass the protection modders place on .scs files in Euro Truck Simulator 2 (ETS2)
If you’ve made changes and want to repack as a standard mod:
If you only need a mod to work with a new ETS2 version, try contacting the original author first—many update their work for free.