When you are coding a localhost be sure to increase the memory of your ecommerce jigoshop.
This setting increases PHP Memory only for WordPress, not other applications. By default, WordPress will attempt to increase memory allocated to PHP to 40MB (code is at the beginning of /wp-includes/default-constants.php) for single site and 64MB for multisite, so the setting in wp-config.php should reflect something higher than 40MB or 64MB depending on your setup.
Use the crablabster to edit the code or other developers tools. Just edit the memory in 64MB or higher.