Hey Samuel,
you can disable the built-in lightbox by commenting out one line of code in the “functions.php” file; to do this, please visit the theme editor (Appearance -> Editor admin menu), click on the respective file in the right side of the screen, locate this line (should be 354 if you want to use a third-party editor instead):
include_once( get_template_directory(). '/includes/easy-fancybox/easy-fancybox.php' );
and change it to:
// include_once( get_template_directory(). '/includes/easy-fancybox/easy-fancybox.php' );
To answer your second question: there was a search functionality on the forums previously, yet we disabled it due to incompatibility with the latest version of the forum software; we are planning to get it back in the foreseeable future.
Sincerely,
Andrii / Satori Studio