This is working great now!  Thanks for the quick fix!

It looks like MX Hero is trying to load content over http instead of https.  When I look at the console I see the following message:

[blocked] The page at 'https://mail.google.com/mail/u/0/#inbox/xxxxxxxxx'... was loaded over HTTPS, but ran insecure content from 'http://email-gateway.mxhero.com/api/checklogin?gus... this content should also be loaded over HTTPS.

(links changed to hide identifying information)  I am using Chrome dev channel Version 38.0.2096.0 dev (64-bit) on Mac OSX.

I will check to see if there is a bug report form I can fill out for MX Hero.  

I am having the same issue.  I see a new window pop up then immediately close.  Then a message box shows up saying "mxHero requires your authentication in order to continue."   Haven't found a work around for it yet.