This might be helpful to Alex. I created a file called passwords.txt, then tried to delete it with my FTP client (FileZilla), and I get the error message:
Command: DELE /passwords.txt
Response: 550 /passwords.txt: Forbidden filename
If you really want it gone. Add this php file to the same directory containing your passwords.txt file. Then go to this page via your browser to execute the script. Whatever you name this file, make sure it has the ".php" extension.
<?php
unlink("passwords.txt");
?>
