ppooll comes as max-Package:
make sure you have max8 installed, then
unzip the file and place the folder "ppooll" into ~/Documents/Max 8/Packages/
then open max and
open ppooll_host from the Extras menu.
lloopp downloads: lloopp_downloads
this is where you can find older releases. the latest version of lloopp is lloopp1.6
and there are many even older versions including versions for max 4.3 or OS9 if you dig down.