v1.7, 2012/08/10
v1.6.1, 2012/06/19
v1.6, 2012/06/18
v1.5.3, 2012/04/19
v1.5.2, 2012/01/24
v1.5.1, 2011/12/09
v1.5, 2011/11/22
v1.4.1, 2011/11/14
v1.4, 2011/11/02
v1.4b2, 2011/10/13
v1.4b1, 2011/06/28
v1.3, 2010/12/01
v1.2.1, 2010/09/29
v1.2, 2010/09/27
Praxis v1.1, released on 2010/06/24
Praxis version 1.0, released on 2010/04/08
Praxis version 1.0 beta 2, released on 2009/12/10.