Had a tech try an upgrade from 5 to 6.0 sp3 using Filezilla server and the software installer tool.
The files would not FTP from the server to the 3300, a lot of FTP errors on the log.
On the PC you can go to command prompt and login to FTP and do a dir and see all the files, also tried a second computer and had the same problem.
Usually if there is a problem with FTP there is a problem at the server end and not the 3300, a DBMS check was done on the 3300 and there were no errors.