OpenStudio 2.0.0 was released as an iteration package (it does not replace 1.14.0 as the main release yet). You can download the 2.0.0 release from the developers page. We expect that there are issues yet to be found in testing so we are not yet recommending 2.0.0 for production work, OpenStudio 2.0.0 will replace the main release in March once it has gotten some more testing in the real world.