The file shown is the file that is ready to download, just press "D" to download that file. Press "N" or return to move to the next file in your download list, you can also skip a file this way. If there is a problem with the download, you can just press "D" again to try downloading the same file. You always have to press "N" or a return to move to the next file. Press "Q" to return to the file section menu.