The latest version brings a number of new features.
First, if you're using a graphics drawing tablet, you can now use pen pressure to drive the brush size and/or intensity. The tool now also features three different brush profiles for a wider range of results.
Please note that the brush profile currently used, based on the selected brush and the value of the Hardness parameter, is displayed in the parameters window.
Automatic upscaling is also now available allowing to improve low-resolution heightmaps and produce a higher-resolution terrain. You can also use the upscaling node with a Colorize Satellite map node to render your terrain easily.
There's the new Soften node to smooth your terrains that can be applied over the entire terrain or driven by a mask. What is more, you can add additional noises to the final result.