I just tried exporting using FC csv and tried to open it in DK's new "upload lineups" tool and it didn't work. Here's the error message:


After looking at DK's csv template, it is apparent that DK is assigning each player a unique ID # that it uses for the import. FC's export csv file simply has the player name per position

Below is a partial screen cap of DK's csv template for tonight's late NBA game with instructions for filling out the csv:


So I would assume once FC compiles all the players' ID #'s and changes their csv export button to account for this, it would work.