1/ Edit calculated field formulas,
2/ add “Calculated fieldx” button to “Fields for export” and save setting.
Fields names You can see in “Mouse over text” or copy this names from xml elements tag names.
Multi-line field should be in “fields for export”
For needed keys use “Mouse over text” names or copy this names from xml elements tag names.
Optionally You can rename “Calculated field” button and csv columns names in part CSV columns + button names.