Tips on Customizing Sell Downloads

How to Hide Sell Downloads Admin Menus

function plt_hide_sell_downloads_menus() {
	//Hide "Settings → Sell Downloads".
	remove_submenu_page('options-general.php', 'sell-downloads-menu-settings1');

	//Hide "Sell Downloads".
	remove_menu_page('sell-downloads-menu');
	//Hide "Sell Downloads → Products for Sale".
	remove_submenu_page('sell-downloads-menu', 'edit.php?post_type=sd_product');
	//Hide "Sell Downloads → Set File Types".
	remove_submenu_page('sell-downloads-menu', 'edit-tags.php?taxonomy=sd_type');
	//Hide "Sell Downloads → Sell Downloads Settings".
	remove_submenu_page('sell-downloads-menu', 'sell-downloads-menu-settings');
	//Hide "Sell Downloads → Products Templates".
	remove_submenu_page('sell-downloads-menu', 'sell-downloads-menu-templates');
	//Hide "Sell Downloads → Sales Report".
	remove_submenu_page('sell-downloads-menu', 'sell-downloads-menu-reports');
}

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

Where do I put this code?

How to Hide Sell Downloads Meta Boxes

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

	//Hide the "Manual Purchase" meta box.
	remove_meta_box('sd_product_metabox_emulate_purchase', $screen->id, 'side');
	//Hide the "Product's data" meta box.
	remove_meta_box('sd_product_metabox', $screen->id, 'normal');
	//Hide the "Programming Discounts" meta box.
	remove_meta_box('sd_product_metabox_discount', $screen->id, 'normal');
}

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