I start Empyrion on steam and a window flashes by quickly, then the EAC screen shows with the progress bar. the progress bar advances, then the window closes. In the mean time, steam shows Empyrion running, then when the EAC window closes, about 3-5 seconds later Steam reverts to Empyrion no running. starting Aug 13, It would not start with EAC, and has never started since. Clear cache, verify game, and restart system does not fix it. I reinstalled the game, did not fix it. (lost all my blueprints - but not a big deal) It WILL start in SP from running the .exe. Does NOT start in MP from running the EAC...exe. If I switch it to SP, it will start correctly from Steam, and I can play SP fine. MP no. I ran repair on EAC. did not fix. I deleted all in the EAC folder, and re-installed, restarted computer, and it did not help. I also did the uninstall. I verified EGS is in the firewall, and added EAC to the firewall. I went to the EAC website, and ran the 2 tests they have and they passed. I whitelisted EAC on bitdefender. I installed the latest WinDoz upgrade as of today. Did a virus scan. I tried the old version of Empyrion 5.5.1 and it started fine with EAC fine. (only old version I had) The game worked for the last 2-3 weeks with EAC, until Aug 13. I do not get any client logs when it does not start correctly. Any Ideas? I have been working on this for 2 days now.