After you download a CSV file from LingQ, close it and then create new regular EXCEL file. Open that new blank excel file and then:
Click on the DATA tab on the top and choose FROM TEXT option. Popup will appear and you should find your CSV file downloaded from LingQ, select it and click on IMPORT. On the next popup choose DELIMITED, click on NEXT and check TAB and COMMA options. Click on NEXT and then FINISH.
That should be it. You can then save the file again in CSV format if you want to import it somewhere. Hope this helps!
Do you by an chance know how to do something similar with LibreOffice Calc rather than Excel? I played around with it, but was unsuccessful; the Greek characters remain as unreadable special characters.
Many thanks!July 25 at 16:49