The "Visit program web page to download update" button on the update checker sent me to a 404 here:
http://ath.dcmembers...ersourceexplorer.php
Did I show up to early? 
-Stoic Joker
I mis-typed the url, have to fix that in the next update, sorry

The download link from this thread's first post is correct, as you found out.
I can now see why on your Win7 config it didn't match the AutoSelect unrecognized tray: Half of the driver-trays have a space pre-fixed to the name. I'll have to strip that off during comparing

, missed that from the previous screenshots, but now it seems obvious.
I can only agree on the crappyness of the HP drivers, as they have IMHO been for the recent 10+ years.
The WinXP display seems quite accurate, doesn't it?