many thanks. I don't suppose you recall which to select, and how?
I downloaded, unzipped and ran the x64.exe file as per the release notes.
Plugged device back in to computer.
I went to the device in WDM, no change,
so I selected update driver ->

browse ->

let me pick from installed ->

type = ports ->

I noticed when I ran the x64.exe the last screen showed:

so I selected Silicon Labs, but not sure on last as there are quite a few options.

Am I anywhere correct here?