M240 Change language from chinese to german or english

Hello, I have used the m240 for a while. All of a sudden, the screen shows chinese signs or korean or japanese, I don´t know. Since there is hardly any manual I don´t know how to get back to german or english. Can anyone please help? Lukas

I installed the latest firmware and the m240 went back to english. Since the music is still on it, I don´t mind why…