I've just pushed a new update which fixes the part picker color issue. Windows will auto-update on next launch, it's however still syncing to the servers. I'll update the thread when it's available. Mac and Linux will have to re-download the full game. If you downloaded the game longer than 10 minutes before this post ago, you will have to redownload.
Windows patch is now live. I also signed both executables, this should stop virusscanners from removing them during extraction. Linux and Mac still have the issue where custom markings aren't correctly deleted. To prevent the issue: Do not use templates after having drawn custom markings! Instead first pick a different part to prompt the notice that you are about to lose your markings, then templates can be used again. Windows has this issue fixed.
Noticed mine said that too. It still works, but expect it to say "Your game is corrupt" on the launcher.