At present, the HUB does not allow you to export data directly in ".csv" format.
This is a limitation beyond our control.
However, to achieve this, you can :
1 - Export the data from your HUB in ".xlsx" format by right-clicking and then "Download to format" and "Data".
2 - Once your file is open in Excel, you can "Save as" and select the desired ".csv" format.