Updated driver for Fingerprint reader & no it doesnt work

I am the relatively happy owner of a Vostro 3300 running W7 (64 bit)

A month or so ago I followed a recomendation to upgrade my fingerprint software to the latest version.  Since then I have had good days, but mostly the damn reader either doesnt work or is not detected.  It is wonderfully inconsistent.

I have now decided to do something about it and reinstall the driver from the Dell site.  So I have downloaded the Driver (dp06_01_008_x64.exe) only to get the following error. 

I assumed from this that I should first uninstall the DigiPersona software, but no of course it is something else.

Can anyone help?