Side bar

It is possible by adding some instructions in theme.

In your theme files create directory jigoshop. Then go to /plugins/jigoshop/templates and copy file “single-product.php” to jigoshop dir in your theme files, after this delete from single-product.php this lines:

<?php do_action('jigoshop_sidebar'); ?>
<?php do_action('jigoshop_after_sidebar'); ?>

And the last thing to do is to open style.css which is located in theme main directory and at the bottom add this lines:

.jigoshop .site-content{
	width:100%!important;
}