This is an x64 distribution for FreeNAS 9.3.1-STABLE built on 201605170422 (yyyymmddhhmm format, GMT timezone, 24-hour time). If you are seeing this README file, this is a 9.3-STABLE build which directly corresponds to an update on the 9.3-STABLE train. You can get the benefit of installing the latest and greatest (without having to apply any updates immediately afterward) by simply installing this release.