The latest version is ready to be downloaded from, http://sourcearchives.com/downloads/
For this test release there is a recommendation in the email posted by Gary Holmlund, http://www.crosswire.org/pipermail/bt-devel/2009-November/009547.html
I suggest uninstalling the previous version of BT before installing this one. Also, delete the c:\Program Files\BibleTime directory if it still exists. This cleans up a problem if an older version of BT was installed and not uninstalled. This should not be necessary in the future.Happy testing!