Confusion on how to install IRremote library

I need to install the IRremote library but I don't know how to (here's the site that I'm on: GitHub - Arduino-IRremote/Arduino-IRremote: Infrared remote library for Arduino: send and receive infrared signals with multiple protocols).

If you would please click on the link, you will find that Ken Shirrif has given instructions on how to install the library. Unfortunately, I don't understand what he means by

Unzip it and rename the directory shirriff-Arduino-IRremote-nnn to IRremote

and everything beyond that.

Please help, and thanks!

I think I figured it out!