WindowsでEditorPrefsを使うときにはBase64で保存する

gistfile1.cs

using UnityEngine;
using UnityEditor;
using System.Text;

public class NewBehaviourScript{
	
	[MenuItem("Window/Save")]
	static void Save (){
		EditorPrefs.SetString ("Hoge", ToBase64 ("日本語"));
	}
	
	[MenuItem("Window/Load")]
	static void Load (){
		Debug.Log (FromBase64 (EditorPrefs.GetString ("Hoge")));
	}

	static string ToBase64 (string s){
		return System.Convert.ToBase64String (UTF8Encoding.UTF8.GetBytes (s));
	}
	
	static string FromBase64 (string s){
		return UTF8Encoding.UTF8.GetString (System.Convert.FromBase64String (s));
	}
	
}