Complex sentence: The current version was released in 2013 (NQA-1-2012), however the most commonly used version is NQA-1-2008 with the NQA-1a-2009 addendum.
Split into simpler sentences: The current version was released in 2013 (NQA-1-2012). Although this is the current version the most commonly used version used today is NQA-1-2008 with the NQA-1a-2009 addendum.