I tried your page several times. I see the same problem you do when I put in a name & an email address and hit submit. It POSTs the form data via ajax, as it should, but no response comes back.
Interestingly, if I just hit submit with empty fields (or just fill in name or email but not the other), then it POSTs the form data via ajax and does return an error response saying I need to fill in both fields. So that seems to work ok.
I’m not sure why upgrading to WP 4.4 would suddenly cause this to start happening. I’m also not sure what the problem is. We’re going to have to try a few things to figure it out I think.
One thing I noticed that was not normal is that when the page first loads, it goes ahead and does an ajax GET back to itself and passes along some of the Contact Form 7 variables. I have seen this now & then on other people’s pages — usually it doesn’t seem to be a problem, but in some cases it tends to point to a plugin or theme conflict.
While examining the HTML of your page, I noticed that the form is within a div that is labeled as “textwidget”. I looked at the Designfolio theme homepage and I see that it has some widgets and some features like ‘header inserts’ (whatever that is). I’m wondering if you have done something like putting the EBD shortcode inside a widget or inside some sort of setting of your theme, rather than directly into the page (into the wordpress page)?
The fact that your form is on the homepage makes it difficult to diagnose, because so many themes do special stuff with the homepage. Aside from answering the question I just asked in the previous paragraph, I would like you to make a new test page that is a normal wordpress page (not the homepage). Make a new contact form 7 form and get the new form id number and use that for your new EBD shortcode. Also, upload a new file to use for the download. Make it a filename you have never used before and make it a .jpg file. Use that download id in your new EBD shortcode. In other words, you are making a new download, a new CF7 form, and a new page with an EBD shortcode using those new IDs.
Set it to ‘both’ in EBD (rather than ‘inline’ or ’email’) and set it to NOT mask.
Then post the new url test page back here. Oh, also, make sure the filename and any text associated with the file are all plain english ascii characters — no accented characters.
