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.
I see the same problem with MX 4.10 and Ubuntu 14.04, I've tried different java versions .. 1.7, 1.8, early access 1.8.0_66-ea all have the same problem with the GPIO dialog box.