Problem with opening the help menu in CED

I have installed creo element/direct recently. And I want to learn CED with quickstart project. But when I clicked the help menu button. It popped up a window which displayed an error message that CED couldn't find the help information in the install directory.I have aleady installed java. Does anyone have the same problem?

Picture below is the error message. It shows an error - "DirectModelling_zh_CN[]" and the install directory which help menu may be.