Nothing shows up when adding repository

I've been following the instructions on
http://dialogextension.com/guides/index.php?f=getting_started

yet when I add:
http://www.polydes.com/repo

in the Extensions > get extension > [Click to add repository] > New Repository, nothing happens, and if I try again it gives a warning about duplicate extensions, so it is added. It worked fine when I tried with "http://www.mazeland.net/repo", so why does nothing show up like in the get started guide?

Stencyl 3.4.0 beta2

Sorry, I was making some changes last night. Try again.

Thanks it's working now

Getting the same problem today