The orders_status 2 - 4 allow the Downloads to be done ... the act of Downloading does not alter the Order Status ...

Downloads can happen providing

1 the orders_status is within the range of 2 - 4

2 Maximum Download and/or Maximum Days have not been used/expired

Update is a special orders_status that when you change the Order to Update it will update the Maximum Days and Maximum Downloads based on Order Date so if the Order Date was May 15 and you only now found out the customer needs to still Download the Product it will make the days however many days since the order + 7 days (assuming the default) and 5 downloads ...