Q1.

Hmm.. my very old proftpd seems to crash when I try to transfer from localhost -> localhost?

Yes, I have noticed this too. Must be some bug or something, upgrade to a newer version.

Q2.

I think the homepage is really ugly! Cant you make it look better?

No.

Q3.

The GUI locks up while I'm transfering the queue!

Yes I know that. It will go away when I do threads (probably in the next version)

Q4.

Umm.. so how do I add files to the queue?

Right click in the filelist and you get a menu with "Add to queue" in it.