Block Updater let user update a Block to a newer version of that Block.
Select Block Updater, available form the App Menu.
Follow the directions to Update a Block to its newest version.
Once Updated you cannot revert back: Make sure to Clone or Export (equivalent of Copy / paste an app) a copy of your app before updating a Block to be able to revert back to a previous version.
NO DOWNGRADE IF NEWEST: You cannot downgrade a Block. If the Block or Layout in your app is the latest version of that Block or Layout, you cannot downgrade to an older version of that component.