While the standard OBDwiz is free with hardware, certain "Professional Add-ons" require their own specific activation.
Upon launching the app for the first time, you will be prompted to enter your license key. Obdwiz License Key
The most dangerous "solution" is the cracked .exe file. Websites offering "OBDwiz Crack + Keygen" are almost exclusively malware vectors. Because OBDwiz requires low-level access to your computer's USB and Bluetooth drivers (Ring 0 access), a cracked version can install keyloggers or ransomware disguised as a driver. While the standard OBDwiz is free with hardware,