To update IT Asset Tool from a preview version you need to follow the steps below:

 

 

how to Update it asset toolStep Description for installer IT Asset Tool 
1Download New Version of IT Asset Tool Installer Pakage
2Unzip It
3Stop the Windows Service "DaemonIAT"
4Execute the installer
5Follow the step of installer
6Restart Windows service "DaemonIAT"
7Start your software asset and Inventory your software