Recently discovered that Q4 2016 CU4 has SafeAssign version 4.0.20 bundled with it and this is not in Q4 2016 CU4 Release Notes.
SafeAssign version 4.0.20 no longer uses sa.properties and the settings are now in the database.\
You can edit these through the GUI interface under System Admin>Building Blocks>SafeAssign>Settings.
We discovered with Bb Support that the 'Institution Release Statement' now has maximum length of 255 total characters and had to shorten the length of the corresponding entry that was in sa.properties.
Release Notes for SafeAssign version 4.0.20 has useful information: https://help.blackboard.com/Learn/Administrator/Hosting/Release_Notes/Release_Notes_for_Building_Blocks/Release_Notes_for_SafeAssign