Download resume problem

Can you enable that,,,we will waiting for update,,,

hi,im trying to edit your plugin.and now download resume is enable.tested by me on my site.
visit free after effects templates.

i just replace process-download.php using code below.and plugin is working fine

<?php
/**
 * Delightful Downloads Process Download
 *
 * @package     Delightful Downloads
 * @subpackage  Includes/Process Downloads
 * @since       1.0
*/

// Exit if accessed directly
if ( !defined( 'ABSPATH' ) ) exit;

/**
 * Process Download
 *
 * Validate download and send file to user
 * http://www.richnetapps.com/php-download-script-with-resume-option/
 *
 * @since 1.0
 */
function dedo_download_process() {
	global $dedo_options;

	// Get download id
	if ( isset( $_GET[$dedo_options['download_url']] ) ) {

		// Ensure only positive int, else could be fishy!
		$download_id = absint( $_GET[$dedo_options['download_url']] );

		// Check valid download
		if ( !dedo_download_valid( $download_id ) ) {
			do_action( 'ddownload_download_invalid', $download_id );
			wp_die( __( 'Invalid download.', 'delightful-downloads' ) );
		}

		// Check blocked user agents
		if ( !dedo_download_blocked( $_SERVER['HTTP_USER_AGENT'] ) ) {
			do_action( 'ddownload_download_blocked', $download_id );
			wp_die( __( 'You are blocked from downloading this file!', 'delightful-downloads' ) );
		}

		// Get file meta
		$download_url = get_post_meta( $download_id, '_dedo_file_url', true );
		$options = get_post_meta( $download_id, '_dedo_file_options', true );

		// Check for members only
		if ( !dedo_download_permission( $options ) ) {
			do_action( 'ddownload_download_permission', $download_id );

			// Get redirect location
			$location = ( isset( $options['members_only_redirect'] ) ) ? $options['members_only_redirect'] : $dedo_options['members_only_redirect'];

			// Try to redirect
			if ( $location = get_permalink( $location ) ) {
				wp_redirect( $location );
				exit();
			}
			else {
				// Invalid page provided, show error message
				wp_die( __( 'Please login to download this file!', 'delightful-downloads' ) );
			}
		}

		// Password protected
		if ( post_password_required( $download_id ) ) {
			wp_die( get_the_password_form( $download_id ), __( 'Password Required', 'delightful-downloads' ) );
		}

		// Empty file urls not allowed
		if ( '' === $download_url ) {
			wp_die( __( 'You must attach a file to this download.', 'delightful-downloads' ) );
		}

		// Stop page caching. Cause conflicts with WP Super Cache
		define( 'DONOTCACHEPAGE', true );	

		// Disable php notices, can cause corrupt downloads
		@ini_set( 'display_errors', 0 );

		// Disable compression
		if ( function_exists( 'apache_setenv' ) ) {
			@apache_setenv( 'no-gzip', 1 );
		}

		@ini_set( 'zlib.output_compression', 'Off' );

		// Close sessions, which can sometimes cause buffering errors??
		@session_write_close();

		/**
		 * Output Buffering
		 *
		 * The majority of servers work when clearing output buffering.
		 * If you get corrupt or blank downloads try the following:
		 *
		 * Disable by adding the following, to your theme's functions.php file:
		 *
		 * add_filter( 'dedo_clear_output_buffers', '__return_false' );
		 *
		 */
		if ( apply_filters( 'dedo_clear_output_buffers', true ) ) {

			do {
				@ob_end_clean();
			} while ( ob_get_level() > 0 );
		}

		// Disable max_execution_time
		set_time_limit( 0 );

		// Hook before download starts
		do_action( 'ddownload_download_before', $download_id );

		// Open in browser
		$open_browser = ( isset( $options['open_browser'] ) ) ? $options['open_browser'] : $dedo_options['open_browser'];

		if ( $open_browser ) {
			header( "Location: $download_url" );
			exit();
		}

		// Convert to path
		if ( $download_path = dedo_get_abs_path( $download_url ) ) {

			// Try to open file, else display server error
			if ( !$file = @fopen( $download_path, 'rb' ) ) {

				// Server error
				wp_die( __( 'Server error, file cannot be opened!', 'delightful-downloads' ) );
			}

		//check if http_range is sent by browser (or download manager)
		if(isset($_SERVER['HTTP_RANGE']))
		{
			list($size_unit, $range_orig) = explode('=', $_SERVER['HTTP_RANGE'], 2);
			if ($size_unit == 'bytes')
			{
				//multiple ranges could be specified at the same time, but for simplicity only serve the first range
				//http://tools.ietf.org/id/draft-ietf-http-range-retrieval-00.txt
				list($range, $extra_ranges) = explode(',', $range_orig, 2);
			}
			else
			{
				$range = '';
				header('HTTP/1.1 416 Requested Range Not Satisfiable');
				exit;
			}
		}
		else
		{
			$range = '';
		}

		//figure out download piece from range (if set)
		list($seek_start, $seek_end) = explode('-', $range, 2);

		//set start and end based on range (if set), else set defaults
		//also check for invalid ranges.
		$seek_end   = (empty($seek_end)) ? ($file_size - 1) : min(abs(intval($seek_end)),($file_size - 1));
		$seek_start = (empty($seek_start) || $seek_end < abs(intval($seek_start))) ? 0 : max(abs(intval($seek_start)),0);

			//Only send partial content header if downloading a piece of the file (IE workaround)
			if ($seek_start > 0 || $seek_end < ($file_size - 1))
			{
				header('HTTP/1.1 206 Partial Content');
				header('Content-Range: bytes '.$seek_start.'-'.$seek_end.'/'.$file_size);
				header('Content-Length: '.($seek_end - $seek_start + 1));
			}

			// Set headers
			nocache_headers();
			header( "X-Robots-Tag: noindex, nofollow", true );
			header( "Content-Type: " . dedo_download_mime( $download_path ) );
			header( "Content-Description: File Transfer" );
			header( "Content-Disposition: attachment; filename=\"" . basename( $download_path ) . "\";" );
			header( "Content-Transfer-Encoding: binary" );
			header('Accept-Ranges: bytes');
			header( "Content-Length: " . @filesize( $download_path ) ); // filesize causes blank downloads on Windows servers

			// Output file in chuncks
			while ( !feof( $file ) ) {

				print fread( $file, 1024 * 1024 );
				flush();

				// Check conection, if lost close file and end loop
				if ( connection_status() != 0 ) {

					fclose( $file );
					exit();
				}
			}

			// Reached end of file, close it. Job done!
			fclose( $file );

			// Hook when download complete
			do_action( 'ddownload_download_complete', $download_id );

			// Done! Exit
			exit();
		}
		else {

			// No disoverable path, redirect to file
			header( "Location: $download_url" );
			exit();
		}

	}

}
add_action( 'init', 'dedo_download_process', 0 );