The version of the PDF Converter Services that can be downloaded from this page covers all different license types including the Trial version.
If you are downloading the software for evaluation purposes then a license is not required even though the software is fully functional with the exception of a watermark in each converted document. If you would like to receive a 30 day evaluation license to remove the watermark then please contact us and we'll provide a temporary license file.
If you have purchased a license then you can download the license key from your order details page. After installing the license the evaluation messages will disappear, there is no need to reinstall the software.
Information about how we license our products is available here. Detailed pricing and an overview of available licenses for this product can be found here.
The current version of the software is 220.127.116.11. (Release notes)