This is the only screen that I can get now, "server connection was closed or could not be established"
Retry just refreshes the same screen.
Is the server down?
I don't know what happened when you popsted the question (I was sound asleep), but at least now it works again for me.
ADDED: as you can read on this forum (http://forum.shuffleit.nl/index.php?topic=3853.msg16591#msg16591) from Stef, there was indeed a problem with the site that is fixed now.