Hmmm I've tried every known way around the Google virus detection issue with no luck. Might need to upload the binaries in a password protected ZIP :-(
If anyone downloaded the new Windows binary already, if they're feeling super generous could they upload it :-)
Can you disable the option in Chrome>Settings>Advanced that says something like "protect my computer from malicious websites" and try downloading that way? If it works you can change that back to the protected state once the download is completed.