from the torrent page:
https://audiobookbay.lu/audio-books/the-martian-re-performed-new-ending-2014-andy-weir/see
https://en.wikipedia.org/wiki/The_Martian_%28Weir_novel%29#Publishing_historyAndy Weir published the book on his website originally, chapter by chapter. Then he did it as a Kindle in 2011.
Podium did the first audio version in 2013.
http://podiumpublishing.com/book/the-martian/Then it was bought by Crown (Random House) and the first print edition was 2014.
They revised the book and later the same reader, R. C. Bray, who did the first version did a new reading.
I got the original reading in 2013, I don't know what the "new ending" is.
The 2013 version ends with a brief coda back on earth.
Bray is a very good reader, at least for most of the book narrated by Watney. Not so convincing when he does various accents for the NASA people.