BizHawk 2.3 was running functionally.
BizHawk 2.3.1 didn't run because there is a problem:
System.IO.DirectoryNotFoundException: Could not find a part of the path 'C:\Users\evan\Documents\BizHawk-2.3.1\gamedb\gamedb.txt'.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at BizHawk.Emulation.Common.Database.LoadDatabase(String path)
at BizHawk.Client.EmuHawk.MainForm..ctor(String[] args)
at BizHawk.Client.EmuHawk.Program.Win32MainLoopCrashHandler.TryCatchFinally(String[] args)