Were you able to install Terrier? There are several ways to do this, but I might suggest installing Terrier Desktop!

Follow instructions at https://github.com/terrier-org/terrier-desktop

Open WSL (Windows Subsystem for Linux)

git clone https://github.com/terrier-org/terrier-desktop.git 

sudo apt-get update 

sudo apt install default-jdk 

sudo apt install maven 

cd terrier_desktop

mvn package assembly:single

sh ./desktop_terrier.sh

The index itself will be found in terrier_desktop/var, in case you're wondering. Installation on Windows will of course be different, and perhaps not as easy.

Installation on Linux, such as an Ubuntu VM, might be a good idea!