How do I change the Nagios Core 4.0.1 Theme?

I would like to change the Nagios Core 4.0.1 theme, I have download theme and extracted it to /usr/local/nagios/share/ arana-style.

But it wont work for me, I want to reboot the Nagios service for theme change.

I followed the below steps.
https://exchange.nagios.org/directory/Addons/Frontends-(GUIs-and-CLIs)/Web-Interfaces/Themes-and-Skins/Arana-Theme-1-2E0-for-Nagios-3-2Ex/details

Suggestion please thanks.