The DEMO version only includes 4 pages:
http://showboxapkzdl.com
http://showboxapkzdl.com/showbox-apk.html
http://showboxapkzdl.com/showbox-for-pc.html
http://showboxapkzdl.com/showbox-for-iphone.html

It is possible to download these free files and install them on your server, so you can test how the site works.
Visit https://www.waybackmachinedownloader.com to buy a fully functioning site.
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