This will force the scripts to import only those orders placed after this date (time is not a
factor). For example, 17/01/2013 will search for orders dated after 17th January 2013.
This date would normally be set to the earliest date from the point when orders should be imported,
often from the date the scripts are deployed in a live environment.
If used in conjunction with "Order Days Back", the later of the two dates is used.