The update addresses a long-standing issue, only reported by 2 users, but with the potential to affect anyone. The issue was a crash that could happen upon loading a second instantiation of either plugin. The issue has been present in versions going back to 1.5.0.
There are also a few new presets in each plugin, but no new features. If you have been affected by this problem, it is recommended that you update at your earliest convenience. Other users please feel free to update when your project schedule allows.