I opened BYOND today just to find a white screen. I cant full screen it. I cant find whats wrong, can someone help me?
Hey. Would you mind uninstalling and reinstalling? It might help, and it's a good first start.
This is usually the result of antivirus or security software incorrectly interfering in BYOND's operation.

However to rule out your firewall, check your firewall to see if it allows all BYOND programs (byond.exe, dreamseeker.exe, and dreamdaemon.exe) full access to both the public and private network. If it doesn't, update those rules or add rules as needed.