As I am new to this forum could someone tell me how to download Birmingham 2014 Super stereo mix or any other of the concerts.

Hello, I am very pleased that you've signed in this forum.
The Bootleg You can start downloading you as a torrent here:
http://www.dimeadozen.org/torrents-details.php?id=491584

The Bootleg is located in Flac format.

The artwork can be downloaded from Pink Camel.