Follow the instructions below to change your website picture.
1. Hover your mouse over the Website tab and click on the Pages sub-tab.
2. Click edit next to the Home page.
3. Scroll down and click Edit next to Picture With Overlay Text widget.
4. Under the current picture, check the check-box that says Remove. Then, click Save at the bottom.
5. Click edit next to the Home page again and upload a new picture.