So, the current revision of PHX (revision #146) is broken - all the models got removed. I assume this is just Phoenix making a mistake. It happens. Luckily, due to the power of SVN, this is easy to repair.
First, right click your PHX folder and in the TortoiseSVN menu, select Update to Revision…
Now, make sure the window looks like this:
Then click “OK”.
Enjoy your not-broken PHX!