The second link I gave you is not an Adobe link, but it does download the files thru the Adobe server, just without the download manager being in the loop. Prior to Adobe providing links such as the first one I provided (which occured only very recently), the ProDesignTools site was the only place you could go to download older Adobe versions and was a constant offering to anyone in these forums looking for downloads.
They are trial versions, just as alot of Adobe downloads are. A trial version is not different from any other version except for the trial period being imposed. You can use the serial number you have to activate the trial to being a fully licensed installation.