Modify the labels of the Downloads post type for Easy Digital Downloads

edd_post_type_labels.php

<?php
function set_download_labels($labels) {
	$labels = array(
		'name' => _x('Products', 'post type general name', 'your-domain'),
		'singular_name' => _x('Product', 'post type singular name', 'your-domain'),
		'add_new' => __('Add New', 'your-domain'),
		'add_new_item' => __('Add New Product', 'your-domain'),
		'edit_item' => __('Edit Product', 'your-domain'),
		'new_item' => __('New Product', 'your-domain'),
		'all_items' => __('All Products', 'your-domain'),
		'view_item' => __('View Product', 'your-domain'),
		'search_items' => __('Search Products', 'your-domain'),
		'not_found' =>  __('No Products found', 'your-domain'),
		'not_found_in_trash' => __('No Products found in Trash', 'your-domain'), 
		'parent_item_colon' => '',
		'menu_name' => __('Products', 'your-domain')
	);
	return $labels;
}
add_filter('edd_download_labels', 'set_download_labels');