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Please see the original post here
Changelog may be found here

This one is more bugfixes and balance work. Important stuff, especially the metal/energy-related changes, but just polish.

What's more than polish is the upcoming expansion, which we'll announce with actual details tomorrow (Thursday, probably noonish eastern time).

We'll be doing a closed beta that will run until the expansion's official release (alongside the 8.0 offficial release) in early August. If you're interested in being part of the beta please PM me (keith.lamothe) on the forums.

Update: 7.037 is out with some text updates specific to the new expansion.

Update: 7.038 is out to hotfix some problems with unlocking the mkII/III versions of the bonus ship types from the new expansion.

Update: 7.039 is out to fix several bugs discovered early in the new expansion's beta, so the testers can proceed without them in the way.

Update: 7.040 is out with another batch of fixes for the new expansion's beta.

The Winter 2013 AI War Sortie Bulletin topic at the community hub is a place to find other players.

This is a standard update that you can download through the in-game updater itself, if you already have 6.000 or later. When you launch the game, you'll see the notice of the update having been found if you're connected to the Internet at the time. If you don't have 6.000 or later, you can download that here.