Release Notes: In older versions, it wasn't possible to delete a single row via the checkout page. From now on, if the value of the quantity is "0" after submitting, the row will be deleted. See the modified methods messages() and update_row(), and the new method delete_row().
Release Notes: A small bug inside the handle_cart_row() method where it was not possible to change the $replace variable was fixed, and the update_row() method can handle this parameter too. An option to recover old orders for a customer during the next access was added. The RECOVER_ORDER constant was added to the db_cart() and remove_old_orders() methods. The new constant VALID_UNTIL defines how long an old order will be available for recovery.