The latest public release of Bryce is out now, version 188.8.131.52 (applies to both Pro and PLE versions). If you have already purchased Bryce then it should appear in your Downloads at the DAZ site. You'll want to re-download the content installer as well as there are some new tutorial scenes included too. The announcement at DAZ lists a number of new features:
Changes to the DAZ Studio Bridge to take less memory
Note that the Dirt Shader is called 'Curvature' in the program.
You can check out the public announcement over at DAZ here: Bryce 184.108.40.206 Production Release Now Available!