To change the default product in CONSIGNOR go to 'Setup' in the lower left corner.
Press the + until you see all your carriers.
The carrier on the top is the carrier that is your default.
Press the + infront of the carrier and subcarrier.
The top product is the default product in you Production view.
Press and hold the product you want as default and drag it up to replace the current top product.
On the picture under we are moving the product 'Budbil' up to the new default product instead of 'Ekspress'
The same logic applies to everything in CONSIGNOR setup as long as what you are moving is on the same level.
As you can see on the screenshot under we are now moving 'Consignor (NO)' up to be the default carrier.