Ok, I just found out. You can download it for free, yes, but when you are going to install it, it asks you for the license, which you have to pay for.
Two things:
1) It is a commercial product with a free month of full usage. After a month you can continue to use it indefinitely with a few advanced features deactivated (these are listed on the webpage). In other words, it is perfectly usable for no cost at all, indefinitely. And free for a month with all advanced features.
2) CPT 4 and above are commercial, but CPT 3 is completely free. He took it off of his website for download, but I have it on mine if you are interested in it: http://gorgonian.weebly.com/pgn.html
Also, I bought CPT5 and don't regret it for a second. One of the few commercial chess products I feel is worth paying for (until something free comes along to replicate its features, but nothing is close as of now).
Thank you very much for your clarification. I just downloaded the version 3 from your website ^^ which, by the way, looks great!
Thanks again!!
You're welcome, and thanks!
https://itunes.apple.com/app/play-magnus/id808138395?mt=8
Description
Want to test your chess skills against the World Champion of Chess? Now you can! Play Magnus offers you the opportunity to play chess against the official Magnus Carlsen "tuned" chess engine and gives you the chance to qualify to play Magnus Carlsen Live at a secret location! Play Magnus on your iPhone and iPod Touch - it's free!