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