The unstable branch in steam has been updated with more polish to the Alpha 7 build along with a great variety of performance improvements and fixes for several memory leaks throughout the game.
Whereas before there was an emphasis to avoid progress loss, the focus at the moment is to take the time to be thorough and ensure the current state of the game was being optimized. There is still a bit of work to go but overall the game should be much more stable for longer periods of play.
This build also upgraded the engine of the game so there are several UI and graphical issues in the unstable branch. This mainly consists of text not properly sized to the buttons in some cases or images slightly offset etc, but it all should be working.
This should be wrapping up shortly and will then move immediately back to feature development, and content!
The Latest patch notes can be found here: