For evaluation purpose and some old versions of our products we use the ionCube PHP Encoder to protect the source code. The PHP code will get pre-compiled and encrypted and a separate PHP module is required to load it: The ionCube Loader. On the most servers this module is pre-installed and no additional action is needed.
If you need to install a loader just download it from here for free. Additionally we recommend to use the Loader Wizard, which will guides you to the installation.