How to fix "Authentication failed":
If you are using [BEST] software version 1.58 or older you should edit file best.ini
If you are using [BEST] software version 1.59 or newer (1.59, 1.60, 1.61, 1.62 etc.) you should edit file settings.ini
Edit configuration file name: open it with any text editor, f.e. use Notepad or Wordpad
[server]
login= write here "Online Account Username" from "DongleManager"
password= write here "Online Account Password" from "DongleManager" or new password (if you have changed it in Online Service)

