Look like I am going to post the answer to myself, lol.
One way to do it is to open the project with VS, then in the Solution Explorer window, right click on the http://localhost
... line, click on Delete to remove it.
Now, click on the Solution (top line) and right click to Add Existing Web site, browse to the chapter's PaidTimeOffSolution\PaidTimeOffUI and select it.
Now save and close the project, and re-open the project, the VS's attempt to http will be gone.
Note: you may need to modify the connection string in the web.config file.