Okay, my stubborn streak won out and kept at it until I had: "C:\Program Files\Openscad\libwinpthread-1.dll""C:\Program Files\Openscad\libgcc_s_seh-1.dll""C:\Program Files\Openscad\libpython3.10.dll" all in that folder and the program was able to launch successfully. I've gone to Edit | Preferences | Features and enabled "python-engine" and quite and re-launched, so making progress. One thing which I am immediately curious about is would Python programs have support for the Customizer? Or, be able to create a graphical dialog for making settings? William