How does one stop grails from executing in Intellij?

I can't see where/how to stop grails from executing in Intellij.

I started it by doing ctrl-alt-G, and gave run-app command, but there is no grails stop-app, and I never pressed the Intellij green Run arrow, so?

How do I change my Grails version in IntelliJ?

I right clicked on the application and went to Grails -> Change SDK Version. I chose the version I wanted, then IDEA asked me if I wanted to upgrade the application. Clicked yes and all was good.

How do I add Grails plugins to IntelliJ?

Support for the Grails framework is not bundled with IntelliJ IDEA. You can install the Grails plugin from the JetBrains repository as described in Install plugins. The latest compatible version of IntelliJ IDEA is 2021.3. You can find the documentation for Grails support in earlier versions of IntelliJ IDEA Help.

I'm not sure if it graceful or not, but there is a small skull button to kill the process in the same window which appeared after you do "ctrl-alt-g run-app" (left top corner)