I'm developing an IntelliJ plug-in that includes a settings panel to configure certain settings specific to my plug-in. On Idea 14 it works fine. My plug-in panel shows on the "other Settings" section of the Idea Settings dialog. I have my settings panel class implements Configurable and also persisting the data and all works fine. On Idea 2016 it stopped working and my plug-in settings panel do not show in the Settings dialog. What have changed in idea 2016?
You are not alone, you need to change your plugin and have separate classes for your Application/ProjectComponent, PersistentStateComponent and Configurable: https://youtrack.jetbrains.com/issue/IDEA-150516