Import SetupTheme-demo.xml file which you will get from the Setup WordPress Theme Pack. To get the Theme installed as shown in the demo you need to import a .xml file into your WordPress dashboard.
Go to Dashboard from the left Sidebarmenu Tools > Import. run the importer from the WordPress option.
Click on upload file and import, choose your .xml file, and click on the Upload file and import button. Then assign your author from an existing user (or) a new user and click onSubmit.
Now your file is successfully imported that you need to enable Main Menu, click on customize (present in the top bar), a left sidebar will appear select Menu’s option
Then select Main Menu scroll to the bottom you will see Menu location set Primary now your Menu is ready.