Cannot upgrade the WPMU Dashboard plugin to V3.4.2

Hi there, I keep getting this error with link message on my screen when I go to automatically update. Also when I click the link for download details I get to this page: https://premium.wpmudev.org/wdp-un.php?action=details&id=119& but when you click on download you get nothing - I want to download it manually so I can FTP it up to my site, is this not a solution? If so where do I get the download link for this plugin? Thanks for your time