I already have a certificate on the install.exe
See below:
As far as building a reputation... How can you build up a reputation for a product that can't be downloaded!
One thing I noticed with respect to the Chrome browser... If the download home page is connected via https and you have a <a href= tag that uses http: instead of https:, Chrome will totally ignore the click on the hyperlink! No popup warning or nothing. Just totally ignores the click event.