LightProDome in Daz 4.x It can be done!
Can't believe I didn't figure this out earlier. You can still use this plugin. All you need to do is open a new scene in Daz 3, load the LightProDome sky, save this as a scene.
Open up a new scene in Daz 4.x and simply merge the light scene into the Daz 4 scene.