homepage not changing

I just downloaded this theme and set it with a static front page, but anything I change in that particular page is not reflecting to the main website.

The text, pictures, all remain unchanged. Strangely enough if I delete the page it’s not displaying anything anymore.

Where is the main page data coming from? Do I need to edit it some other way?

Thank you,

The page I need help with: [log in to see the link]