for a tool that helps with personal, non-distributed mod editing (e.g., for compatibility fixes, translation updates, or personal use where the original mod is abandoned and the author gives permission), then I can help with a technical feature description that is ethically framed.
Before trying an unlocker, check if the mod is simply a . You can often right-click a .scs file and select "Open with..." using 7-Zip or WinRAR to see the contents immediately. If you'd like, I can help you: Find a specific tutorial for the SXC Extractor SCS Unlocker for Locked Mods - Euro Truck Simulator 2