In your download folder complete package there is a folder named, demo/ in which you can find readme.txt file which tells you about your username and password of demo installation which you should change after login. I have pasted readme.txt file below and username password in separate message. Thanks.
To install Demo Exact like the preview.
demo Installation logins:
Username: administrator
Password: ***********
1) Please download and install plugin "All-in-One WP Migration" From https://wordpress.org/plugins/all-in-one-wp-migration/
2) Go to wp-admin / All in one wp migration >> Import, On Button Import From Select File, demo.wpress from the demo folder of your download package. Upload that file. and Click continue.
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= After Demo Setup =
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Please change your admin password Asap. Dont use this password as its public password.
Go to Settings >> General Change Email address.
Go to Users Edit your profile and change your name, and email as well.
That's it!