Could not update

The app is unable to update itself. The following regular reports that a newer version is available for download! The download can not be installed because a file with the same name and ID already exists! The AVG Support presents itself to me as a great impudence is, to a German-speaking Support for no other you will be ignored by the "Customer Service" and even English mails will be answered with automatic mail that the message was written in an incomprehensible language