I have the same stick, and the latest version 3.62. (It's 9.5 megs in size.) It looks like Logitechs site is still down. I've used the version on the CD that comes with the stick, and the newer one seems no better IMO.
Don't you have the CD it came with?
If not, send me an e-mail or reply saying you need it and I'll see what I can do. Maybe I can ftp it somewhere that you can download it from.
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bloom25
THUNDERBIRDS