How to install plugin

[athenaxstories]

i wanna use this plugin
https://community.mybb.com/mods.php?acti...ad&pid=360

i dont know which file to upload to root
i know where to place jscripts , inc , images

where i need to place 
tylsearch.php
thankyoulike.php
converter.php

[ziuma]

this is how to install plugins

https://docs.mybb.com/1.8/administration/plugins/

[OakleY]

These are placed under the root directory

[ziuma]

tylsearch.php
thankyoulike.php
converter.php

upload here