I see a number of similar issues previously reported. Using latest Chrome on Windows 7 Professional, the browser is mis-recognized as Apple OS. After selecting the Windows version (any) the download button is active but does nothing. Switching to Explorer, the OS is correctly recognized and the download was possible. Looks like two defects in the interface.
I hope you were able to download Compass.
Thanks for notifying this, I will check this and report to the concerned team if this is an issue.
Please let me know, if you have any questions.