Restart your computer. A "Test Mode" watermark should appear in the lower-right corner of your desktop. Disable Security Features Temporarily disable User Account Control (UAC) and any active Antivirus software
What (if any) are you seeing when the program fails to open?
Because manual installations of version 3.40 are prone to errors on modern hardware, most professionals now use the official Autodata online platform , which starts at approximately and provides up-to-date manufacturer data without installation issues.
Double-click the correct file corresponding to your Windows architecture.