If I change a Helper layout, will it change where it's used?
No. Helpers are coupled with the page once placed. Changes to the Helper layout will not affect existing instances.
Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
No, the entity browser does not work for component defaults as the entities are content, not config.
Google maps may not be showing if you have not set a Google maps API key.