If you are using a Mac you can try following this guide: https://www.youtube.com/watch?v=6--dQQ9U1fs
If you are on Windows you can try using 7Zip to extract the files as that is what I used to create the archive.
If you are still having problems unzipping the archive please contact me as well as letting me know what operating system you are using.
You can import the bricks that you would like to use from their own blend files into one blend file and use them to create anything you can imagine.
Included renders were rendered using the cycles engine but you can render using the Eevee engine as well. Please contact me if you have any questions.
In any Blend file go to "File > External Data > Find Missing Files" and choose the textures folder included. This will find all of the missing textures within the textures folder.