Steps to reproduce: - Install GPE in Eclipse 2023-09 - Create a new GWT project (webAppCreator com.google.gwt.TestProject) - Import created project - Create a run configuration "GWT Development Mode (DevMode)" In the "GWT" tab the "Super Development Mode" radio box is disabled - Switch to the "Main" tab The "Project" and "Main class" will be filled out automatically Main Class: com.google.gwt.dev.DevMode - Switch back to the "GWT" tab to enable super dev mode -> The option disappered See attached screenshots   