For those who have not been able to use / launch DJI assistant 2, on Windows 10 based systems. It was failing the "User Account Control" (UAC).
An uninstall of the older version and download then reinstall of the new version 1.2.5 fixed the issue, for me.

Hi, thanks for sharing this informative thread for our customers who use Windows 10 computers. In additon to your great help into our customers, the details below are the new versions that were released for the DJI Assitant 2. Thank you for continued support.

*DJI Assistant 2 V1.2.5
*DJI Assistant 2 For Phantom  V2.0.7
*DJI Assistant 2 For Mavic  V2.0.7
*DJI Assistant 2 For Matrice  V2.0.7
*DJI Assistant 2 For Autopilot  V2.0.3
*DJI Assistant 2 For AeroScope  V2.0.1
*DJI Assistant 2 For MG  V2.0.13
*DJI Assistant 2 For Ronin  V2.0.2
*DJI Assistant 2 For Battery Station  V2.0.1