Is this stuff really free? I wanted to download the program but saw a note about an expiry date. Is it a trial version?
You have to download, install, and activate before the expiry time or you don't get it for free.
You can not install or reinstall after that time. And the expiry time you see on that page isn't the real expiry time...that is just the download expiry on that file's hosting. The real expiry time is on the program page on GiveAwayOfTheDay, which is only 1 day.
If for any reason you mess up your OS and have to format and start from scratch, you will not be able to reinstall it.
So, this is an extended trial that lasts till you mess up your OS, which for some people that make regular backup images of their OS partition, could be forever.