Development tools for Zephyr on STM32Workbench for Zephyr: VS Code extension to set up, build, flash and debug Zephyr applications on STM32.Devicetree manager: browse, edit and visualize Zephyr devicetree, STM32CubeMX-like for Zephyr.
Ok, final word on this is that a reinstall fixed the problem - I actually couldn't uninstall the app due to a Java problem, so I hacked away at it manually. I also removed and reinstalled Java runtime 64 bit. Thanks for the help...
DT