Download and Run the Maxi Link II https://autel.com/u/cms/www/202503/19030951onuk.zip
Download the update files https://autel.com/u/cms/www/202205/16005108sald.rar
First install the operating system then the DTC library.
Download the user manual https://autel.com/u/cms/www/202004/23030327s7kd.pdf
Follow instructions on page 26
To update your scan tool, you need the following items.
AutoLinkll AL539/AL539b
A PC or laptop with USB ports
A USB cable.
Here is a video how to update the device https://www.youtube.com/watch?v=9JcfYBXkPiI