MultiMAN now uses an older version of this (it's much better than what MultiMAN was using before).
As for this v3.0, as far as I can tell it doesn't work, and it is labeled on his site as an unofficial/in-development build. The last official release is v2.3, and it works fine.
v3.0 however (at the time of posting this) doesn't work at all for me. The icon on the XMB has no description/title beside it, and when you run the app it just crashes/kicks you back to the XMB, but the v2.3 still works fine when I went back to it.
It's better than blackb0x's FTP by far (more stable, just as fast, ability to set your own password or none at all) but since this version is not ready, download v2.3 instead for now.