Switching Between OpenGL and DirectX in Google Earth Pro
Use the Google Earth Repair Tool
Clicking on the highlighted option will switch between the two renderers.
You will probably see OpenGL rather than DirectX as the present renderer.
One has to close Google Earth Pro first. The Repair Tool will remain open.
Now clicking on the option will switch beween to two renderers
Now close the Repair Tool. Google Earth Pro will use the selected renderer.