I uploaded a file with 10 items from ninja lister and it took so long to show up that I thought my upload had failed and so I foolishly uploaded the file again...then when I checked again, I saw that that the 1st file had also uploaded. I processed the 1st upload but I can't find out how to delete the 2nd duplicate file. It is asking for a catagory and that's where it sets now...Can I delete it? How?