Hey Michele,
there’s no back-end switch to deactivate the built-in plugins, yet you can do that via the theme’s „functions.php“ file (located in the theme root): replace line 683 from this:
include_once( get_template_directory(). '/includes/shortcodes-ultimate/shortcodes-ultimate.php' );
to this:
// include_once( get_template_directory(). '/includes/shortcodes-ultimate/shortcodes-ultimate.php' );
Sincerely,
Andrii / Satori Studio