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.
Needless to say I am not at all impressed with this forum!
However for any other poor soul stuck with this it is necessary to downrev JAVA, I found 8 worked ok, I suspect the 32bit software has a bug dealing with double digit numbers.