I found the VXDIAG VCX NANO for Toyota from http://www.vxdiagshop.com/wholesale/vxdiag-vcx-nano-for-toyota-wifi-version.html to work very well. Reads codes and performs Active Tests on mhy 2008 Lexus LS600h.
It also supports generic OBD2, so I could use it on other cars too.
I got the wireless one which also came with a USB cable giving a choice of connectivity.
Mine came with a copy of Techstream V14 software.
They have continuous firmware updates for their products. There was an update between them packing it and me receiving it.
It took all of one minute to update with included software.
I installed the drivers and Techstream on Windows 10 64-bit with no mucking about.
Connecting is very quick and it hasn’t missed a beat.
I found I has to tell Techstream I’m in Japan to get all the info about my car-but then, it is a Japanese import.