I’ve updated the functions.php file according to the referred documentation (https://codex.wordpress.org/Changing_The_Site_URL), but the WordPress Address URL remained unchanged, and the images on my website (marktamas.hu) are still broken.

I noticed there are multiple functions.php files (one in the Enfold theme folder and another in the Enfold child folder). Could this be causing the issue?

Do you have any idea what I should do to resolve this?

Thank you in advance for your help!

Ákos