Icepilot,
I have tried pointing the hardware wizard to the folder containing the file (or presumed to contain the file) but it still doesn't work.

Have you asked Weatronic why you have the problem? Did they answer?

Weatronic were quick to answer my first email. Their reply was
"the hardware wizard need to install device driver. You can also find this on c:/progam files/Weatronic/dual receiver tools/usb_driver"

They have not answered my subsequent emails.

Alasdair