The Tencia import file can be modified to suit, however the default format is based on the ArrowLink format as follows

Format CSV

1Order Date
2Customer Code
4Delivery Date
5Customer Name
6Delivery Address 1
7Delivery Address 2 
8Delivery Address 3
11Selling Price
12Stock Location
13Delivery Address 4
14Stock Description
15Order Description Line 1
16Order Description Line 2
17Order Description Line 3