Jeff has just posted a new test client. The link is the same as before:

http://www.starsonata.com/StarSonata_TestClient.exe

The main new feature of this client is that a crash bug is fixed: the old test client was prone to crashing whenever you used many bullets to kill something.

Note that this client is only for use on the test server; it won't work on the main server.

Instructions: Download it, put it in the Star Sonata folder (typically C:/Program Files/StarSonata) and run it from there.