Tips on Customizing Simply Exclude

How to Hide Simply Exclude Admin Menus

function plt_hide_simply_exclude_menus() {
	//Hide the "Simply Exclude" menu.
	remove_menu_page('se_manage_settings');
	//Hide the "Simply Exclude → Settings" menu.
	remove_submenu_page('se_manage_settings', 'se_manage_settings');
	//Hide the "Simply Exclude → Help" menu.
	remove_submenu_page('se_manage_settings', 'se_manage_help');
}

add_action('admin_menu', 'plt_hide_simply_exclude_menus', 11);

Where do I put this code?

How to Hide the "Simply Exclude" Meta Box

function plt_hide_simply_exclude_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Simply Exclude" meta box.
	remove_meta_box('simplyexclude_v2', $screen->id, 'side');
}

add_action('add_meta_boxes', 'plt_hide_simply_exclude_metaboxes', 20);