Even more curious, I downloaded from the UK site, the file name and driver detail is identical from the US site. So they are now seemingly loading the same driver v8.64
The UK site has version 9.04 and 8.64, I downloaded 9.04 then 8.64 my driver says version 8.64 but in the detail of the printer utility it says 'Version 8.64 (9.04)'
Either way the site points to the same software on the same web page, I might uninstall and reinstall