Now I remember why the original Alien Deathmatch did this, too!
If I check a directory for files (level directory!) to compile my list of levels, and then add a level in there (Downloaded) and then recheck the directory to make a new list of levels, Blitz has managed to keep a cache of the directory, and so refuses to show up any new ones.
The only option is to close the game, and reload.

*sigh*

I'll have to create my own list of files, and update it as I go..

Still, the upload and download is now working!
I can make a level in the editor, play it in the editor, save it, then the next time I update my highscores, up it goes!!
Everything looks nice and secure, too so I think I'm ready for a release come Tuesday.
Meanwhile, though, I've plenty of bugs to tweak, and I have some sounds that I forgot to add (The enemy spawn for one!!) Silly me..
A few more days to go, and you can all be playing a proper version!
Luvly stuff!!