3.
Choose Protocol: You can leave this as it is.Choose Domain: If you don't have multiple domains, leave this as it is.In Directory: If you want to install this in a directory, for example example.com/directory, enter the directory name. Otherwise, leave this blank to install in your main domain example.com
Admin Username: Your new Silex username (for security reason do not use the "Administrator " or the "Admin " username.)Admin Password: Use a strong password.
Finally, scroll down to the end of page and . Install babies.