Are you having trouble to the software, or are you specifically stuck on the activation screen ? Troubleshooting OBDwiz Activation - OBDLink
: If your unit included a CD, the key is sometimes printed on the back of the case.
If you're looking to purchase an OBDWiz License Key, make sure to buy from an authorized dealer or the software developer's website to ensure you're getting a legitimate product.
Look for a "Quick Start Guide" or a separate slip of paper inside the retail box.