version 1.5.9 is highly risky and generally not recommended. While version 1.5.9 brought significant improvements like better performance, fixed traffic, and realistic sound, unofficial "repacks" often bundle malicious software or lead to non-functional game files. Why to Avoid Unofficial Repacks
Users who purchased the standalone version can exchange their serial number for a free Steam activation key , though this permanently deactivates the original standalone serial. city car driving 159 activation key upd free repack