Well, since then I have a spanking new Windows 10 64-bit Professional Installed..(more money down the tube) , DJI Assistant 2 works fine and DJI Flight Simulator still cant see the 
Mavic 2 RC...I surely am not going to pay them $1500 for the full version if they cant help getting the Trial running..
From the driver installation on a newly installed and updated Windows 10 64-bit
Teh 64-bit drivers dont work at all, the DJI FS installs the 32 bit
C:\Windows\system32>echo DriversV1\Drivers_Win10_x86
     DriversV1\Drivers_Win10_x86
    
     C:\Windows\system32>C:\Windows\System32\pnputil -i -a      "C:\Program Files (x86)\DJI Flight      Simulator\Driver\Drivers_Win10\VCOM_OLD\dji_vcom_driver11.inf"
     Microsoft PnP Utility
    
     Processing inf :            dji_vcom_driver11.inf
    ----> Failed to install the driver : No more data is available.
   
     Total attempted:              1           
     Number successfully imported: 0
         
     C:\Windows\system32>REG DELETE      "HKLM\Hardware\Devicemap\Serialcomm" /v Winachsf0 /f
     ERROR: The system was unable to find the specified registry key or      value.
    
     C:\Windows\system32>C:\Windows\System32\pnputil -i -a      "C:\Program Files (x86)\DJI Flight Simulator\Driver\Drivers_Win10\Vision\vision_x86\Vision_(Interface_3).inf"
     Microsoft PnP Utility
    
     Processing inf :            Vision_(Interface_3).inf
     Successfully installed the driver.
     Driver package added successfully.
     Published name :            oem20.inf
        
     Total attempted:              1
     Number successfully imported: 1
         
     C:\Windows\system32>C:\Windows\System32\pnputil -i -a      "C:\Program Files (x86)\DJI Flight      Simulator\Driver\Drivers_Win10\winusb\x86\winusb.inf"
     Microsoft PnP Utility
    
     Processing inf :            winusb.inf
     Successfully installed the driver.
     Driver package added successfully.
     Published name :            oem18.inf
         
     Total attempted:              1
     Number successfully imported: 1
         
     C:\Windows\system32>C:\Windows\System32\pnputil -i -a      "C:\Program Files (x86)\DJI Flight      Simulator\Driver\Drivers_Win10\STM_VCOM\stmcdc.inf"
     Microsoft PnP Utility
    
     Processing inf :            stmcdc.inf
     Successfully installed the driver.
     Driver package added successfully.
     Published name :            oem19.inf
         
     Total attempted:              1
     Number successfully imported: 1
    
     please reboot your system!