The PDF Converter downloadable from this page covers all different license types, SharePoint editions (2007-2019) and available languages.
Upgrading from a previous release? Please read this Knowledge Base article first.
If you are downloading the software for evaluation purposes then a license is not required, the trial is fully functional.
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.
The current version of the software is 10.1.0.159 (Release notes).