Upon clicking the download link for the Mac version of the 6.5 update (after “qualifying”), I get a 404 error.
Help? 
Hi,
we just tested the links again and they are working here.
Can you please try again and make sure to click the link immediately after it is shown (to make sure your Router is not reconnecting for whatever reason, which would result in a new IP address). Does it help?
Best,
Helge
dude i’ve been trying for a week everyday and omg it turned out to be such an easy workaround to the problem
my solution was to enter the license number and once the link comes up if you click and you get the 404 error,click back to go back to the page with the link,refresh and click on it again and wahooooooooooooooooooooooooooooooooooooooooo
Cheers Helge, Buffaloman.
After 3 minutes of trying to click and refresh as fast as I could (must say i felt a bit ridiculous), I fired up another browser that wouldn’t open the download link as a new tab.
It worked.
Peace!