You can find steps in this article SolarWinds Knowledge Base :: Moving SQL Server Data Warehouse Repositories. The screen shots do need an update but, the steps are the same. Take a backup of the ignite database -> restore it on the new server -> shut down the ignite PI service -> edit the repo.properties file to have the new host and user password information -> restart ignite PI service. You should then get a wizard that will ask you for a activation key and after that is entered from your customer portal you can click the "proceed with upgrade" button and here the database will have the DDL run to upgrade the repository for the schema changes.
If you need help please enter a support ticket we will be happy to walk you through it.