There are 2 installs right now. The “Live” Alpha is at 3.9.0 and the Test “PTU” Alpha is at 3.9.1. The Test servers are where initial patches are tested and previewed. When you install both the test and the Live versions you are required to have 2 complete installs. One for Live and one for Test…, When the 3.9.1 patch is moved to Live you will only download the patch not the entire game for Live when a new patch comes out for test 3.9.2 for example you will only need to download the patch files. You do not have to play in the PTU test environment, but that is where the new goodies are.