Open Graph Settings for MainPage

Hello,

I would like to ask where can we change the settings for our Main Page Open Graph Protocol.

The Articles are working just fine.
But when I Paste my main site in facebook I only get the Page Title and link: my site https://joytv.gr

Facebook Debug for Open Graph https://developers.facebook.com/tools/debug shows me the Title, Url, but no Image.
I know I can change the description field in Global Configuration, but I am stuck on providing the Image.

Please help

Best Regards,

Did you update Open Graph plugin to latest version release at this week ? If yes in plugin configuraiton you can find the same fields like at article page but this affect to whole site. More details you can find here >> http://www.gavick.com/magazine/developer-update-13.html

Thanks for the heads up!
Didn't see that post.