Tips on Customizing WP Product Review Lite

How to Hide WP Product Review Lite Admin Menus

function plt_hide_wp_product_review_menus() {
	//Hide the "Product Review" menu.
	remove_menu_page('wppr');
	//Hide the "Product Review → Product Review" menu.
	remove_submenu_page('wppr', 'wppr');
	//Hide the "Product Review → More Features" menu.
	remove_submenu_page('wppr', 'wppr_pro_upsell');
}

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

Where do I put this code?

How to Hide the "WordPress Guides/Tutorials" Dashboard Widget

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

	//Remove the "WordPress Guides/Tutorials" widget.
	remove_meta_box('themeisle', 'dashboard', 'normal');
}

add_action('wp_dashboard_setup', 'plt_hide_wp_product_review_dashboard_widgets', 20);