Problem Importing addresses from a CSV

I have a CSV file from Outlook with addresses I want to import into Thunderbird. In an older version of Thunderbird I was able to match the fields in the CSV to the fields in the Thunderbird address book but in the latest version this seems to be missing - I was able to move the fields up/down to match before importing but this doesn't seem to be available (see attached screen shot). The import screen looks different with no way of moving fields up/down to match. The drop down arrows on the fields on the right (the Thunderbird address fields) only show one field so I am not able to match them. How do I match the fields to the CSV file so I can import my addresses/contacts. Thanks