Terragen crashes on adjusting the Colour offset of a power fractal while the display preview is open.
To repeat this crash :
Open default scene Terragen 3.3.04.0 Windows. Leave the default 3d preview window active and in Terrain mode.
Right click on the node window and do Create Shader, Color Shader, Power Fractal V3. Leave it unconnected to any other nodes.
Open a default sized preview window that displays the image of the power fractal.
Go to the color tab of the fractal and start quickly sliding the Colour contrast, roughness and offset sliders.
Terragen crashes.