Note: Do not use for Bundles… they have no files

Add following code to line 93 (just above the download_files = ….)

if (edd_is_bundled_product($id)) { // is it a bundle?
				$products = edd_get_bundled_products($id);
				$files = array();
				$download_files = array();
				foreach ($products as $p=>$product) {
					$files = edd_get_download_files( $product );
					$download_files = array_merge($files, $download_files);
				}
			}
			else 	// its not a bundle
				$download_files = edd_get_download_files( $id );