Here's an alternative to Hide ACF Menu from Clients, add it to your functions.php:

<br />
add_action( 'admin_menu', function() {<br />
	if (! current_user_can('administrator')) {<br />
		remove_menu_page('edit.php?post_type=acf');<br />
	}<br />
});<br />

Note, remove_menu_page() needs WordPress 3.1 or newer