If you own a package of the API, which is encoded with Ioncube you need a loader installed on your server. There are 2 ways to get ioncube encoded files to run:
1. Install the loader in your php.ini
2. Load the loader at runtime
For details how to install ioncube or simply to check if it is installed, just download the loaders from http://www.ioncube.com/loaders.php, extract its content to /SetaPDF/ioncube and open the file ioncube-loader-helper.php in the directory /SetaPDF/ioncube in your webbrowser and follow the instructions. For further instructions go to http://www.ioncube.com/
Each ioncubed package needs a valid license to run. The provided licensefiles for the SetaPDF API are named: .htSetaPDF-<API-NAME>.icl
You don't have to rename that file, because the package search for exactly that named file in one of its upper directories. All APIs first searches for this file in the their initial directory. F.g. The SetaPDF-Encryptor API searches first in /SetaPDF/Encryptor/. If the licensefile is not found it goes one directory upwards: /SetaPDF/ and so on...
Please notice that the filename is prefixed with .ht. Some systems hide such prefixed files automatically.