After an update of PhpStorm (MacOS) to the new release and some troubles which led me to remove all PhpStorm app instances and reinstall the latest release and then copying the plugins back to the app folder in "~/Library/Application Support" I was asked again to enable Shellcheck for a shell script I was working on. For that particular file I didn't need the Shellcheck, so I've disabled it. But then Shellcheck didn't work for all scripts and I couldn't find any option in the PhpStorm settings to enable it again. The only option I've found was already checked:
So how can I enable it again?