• Proof Version 5.2 - 2/8/2015
• Proof Version 5.1.5 - 1/19/2015
• Proof Version 5.0.5 - 12/5/2014
• Proof Version 4.9 - 11/16/2014
• Proof Version 4.8 - 11/2/2014
• Proof Version 4.6 - 10/7/2014
• Proof Version 4.4 - 9/1/2014
• Proof Version 3.8.3 - 4/2/2014
• Proof Version 3.8 - 3/19/2014
• Proof Version 3.6 - 2/17/2014
• Proof Version 3.5 - 12/20/2013