public UpdateFieldComparer(WoWFile oldFile, WoWFile newFile)
        {
            this.origFields       = UpdateFieldExtractor.Extract(oldFile);
            this.newVersionFields = UpdateFieldExtractor.Extract(newFile);

            Compare();
        }
		public static void SetWowDir(string dir)
		{
			_wowFile = null;
			ToolConfig.Instance.wowDir = dir;
			_extractor = new UpdateFieldExtractor(WoWFile);
		}