New beta build! https://wiki.arcengames.com/index.php?title=AI_War_2:Multiplayer_Alpha_And_Beta#Beta_2.721_Histiocytes_And_Circles
You need to use the current_beta branch on Steam to play this one. If you have trouble with it, there is a most_recent_stable_beta, now, too.
This one fixes a major performance problem that has crept in for some graphics cards, for some OSes, on the latest driver versions. Essentially, the selection circles around ships were stupidly bad performing lately. They now perform vastly better, and also look way more modern and clean. Other things like the range circles still need to be updated, but it's been a lot of work to get the framework in general here.
Also, there's a lot of updates to game balance. Turrets in particular got some love from ArnaudB, who helped make the new turret balance make more sense and be more consistent. NR SirLimbo and CRC Gamer also updated their mods.
StarKelp also has an entirely new mod available, called Macrophage Histiocytes, which basically greatly extends the base-game Macrophage faction and gives them a ton of new options and powers. As friends or foes, this is a pretty cool new item to be able to play with!