Did you un-install the Netgear software before you tried installing the upgraded software? If not try that or try a different dongle as suggested earlier...
I'm just trying to help.... maybe the previous version worked ..I don't know but all I do know is that I have been trawling the web for you, if thats not good enough...
No, I do appriciate what you've done. Really I do. I'm just saying that I've got to look somewhere else then the software/driver, since I've got the most recent one.