Having started out with a lovely expression engine buildfound yourself needing to upgrade to the newest version of Freeform. A lot of the time this will update correctly with no errors.

However, in cases like mine, it has been perfectly described as:
“I’m getting no entries entered into my Freeform control panel, no notification email, and the redirect goes to the home page.” (source)

The solution is more than likely having to do with your htaccess file. Reading the above linked forum conversation, it appears that with this version of Freeform, your .htaccess cannot have a  rewrite command to redirect non ‘www’ requests to the ‘www’ version.  There is a work around that I used located here.  Cheers!