4.9+ Release Notes
Getting Started 
2016 October - What's new in the 4.9.6 release
2016 June - What's new in the 4.9.5 release
2016 March - What's new in the 4.9.4 release
Minor changes in the 4.9.4 and 4.9.5 and 4.9.6 releases
2015 July - What's new in the 4.9.3 release
2015 July - Minor changes in the 4.9.2 and 4.9.3 releases
2015 July - Help file updates in the 4.9.2 and 4.9.3 releases
2015 June - What's new in the 4.9.2 release
2015 March - What's new in the 4.9.1 release
2015 March - Minor changes in the 4.9.1 release
2014 August - What's new in the 4.9.0 release
4.8 Release Notes
2014 July - Minor changes in 4.8.8 and 4.8.9 releases
2014 June - What's new in the 4.8.8 Major release
New in the Help Files - 4.8.8 and 4.8.9 releases
2013 November - What's new in the 4.8.7 Minor release
New in the Help Files - 4.8.7 release
2013 May - What's new in the 4.8.5 Major release
New in the Help Files - 4.8.5 release
2013 January - What's new in the 4.8.2 Minor release
Earlier Release Notes
2012 March - 4.7.4 Minor patch release
2011 June - 4.7.1 Minor patch release
2011 March - 4.7.0 Major release
New in the Help Files 4.7.0 to 4.7.4 Releases
2010 May - 4.6.3 Minor patch release
2010 April - 4.6.2 Major release
2009 December - 4.6.0 Major release