LAUNCH   X-431 PRO User’s Manual — Vehicle Diagnosis 
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If you have not set the security question ever
, a message box prompting you of 
you haven’t set the security question will appear. In this case, tap “Mailbox 
Retrieve”, the system will send the password to your email. 
3.12.6 Theme 
This option is used to change your UI style. 
3.12.7 Select Serial Number   
This item is used to select the right serial number corresponding to the DBScar 
connector to diagnose a vehicle.   
3.12.8 Connector Firmware Upgrade File Download 
It is designed to upgrade the connector firmware. If a newer firmware version is 
available, tap it to start downloading.   
3.12.9 Log Out 
Tap it to log out and return to the login interface. 
3.13 More 
This option is used to view software information, quick start guide and user’s 
manual etc.