Export as CSV instead of TXT (FEC)


I am trying to export a report in CSV but when I hit the export button, it is exporting directly in TXT.
I am trying to export the FEC (more information here Le Fichier des Écritures Comptables [FEC]).
I tried to use the data export function but I can’t retrieve this report.

I know that I can find a way to translate the TXT into CSV but it is really not convenient.

Thanks for your help