After upgrading to 0.19476 (latest version), one PC stopped working at all. Rolling back to the previous version let it run, reinstalling 0.19476 made it crash at 100% loaded. For some reason, I'd never got around to installing 64-bit Java and StarMade was running fine with just 32-bit Java on 64-bit Windows 10. After installing 64-bit Java, it started running again.
Not a huge bug, but something mildly irritating because of how long it took to track down due to lack of descriptive bug messages. The error message was a vague graphics error.