Yes, I'm sure it's not just minimized. I also checked the taskmanager and there weren't any processes regarding to Empyrion. Steam library didn't say it was running as well and I could just start the game again. Also I'm not bad with computers, actually I'm a computer science student and I'm wondering myself why this isn't working, especially after a fresh Windows installation. Edit: For testing purposes I downloaded a pirated version (Alpha 6.2.0 1109) (sorry) and it is working like a charm. So it might be an issue with copy protection or EAC.