The evaluation versions are separated in two parts: The PHP files and a license file.
You need to download both from your personal pickup depot.
License files are named
The license file is shipped with an INFO file which is located in the same ZIP package. If you only see the INFO file, make sure that you are able to see "hidden" files. Some operation system (e.g. MAC) automatically hide files with a dot-prefix.
Simply place the license file in an upper folder of the PHP files (e.g.