: The Professional license allows for the reprogramming of engine controllers (ECUs), updating software versions, and inserting injector codes.
In the context of diagnostic software, "FUL" or "FULL" often indicates: Detroit Diesel Diagnostic Link -DDDL- v8.04 FUL...
Install the drivers for your specific adapter (Nexiq, DPA, etc.) before plugging it in. Reboot your PC. : The Professional license allows for the reprogramming