Hi, kindly be noted that AL439 is not subscribed product and there is no need to register it. Please go to Autel website via below link and download the update pack under Downloads menu. Then update the tool with the files in the update pack via MaxiLink II software. If you have no MaxiLink II software, you can also download it on Autel website and install it on a PC. Please try first. Thanks!
http://www.auteltech.com/Code%20Readers&Code%20Scanners/362.jhtml (AL439 update pack under Downloads)
http://www.auteltech.com/autelcms/UpdatesDownloads/429.jhtml# (MaxiLink II software under Old Products)