verifying authenticity of Omnigroup software

Joe Malcolm <[email protected]> Tue, 4 Feb 2014 22:17:21 +0000
Newsgroups gmane.comp.graphics.omnigraffle.user
Message-ID <[email protected]>
Does Omnigroup publish md5/sha hashes or signatures for its software?
It appears that the download link is http, not https.

Joe