This plugin is licensed under the GNU General Public License v2 or later.
Full text: https://www.gnu.org/licenses/gpl-2.0.html

The Pro build bundles smalot/pdfparser (https://github.com/smalot/pdfparser),
licensed under the GNU Lesser General Public License v3, in includes/Pro/Vendor/Smalot
(see LICENSE.txt and README.txt there). LGPL-3.0 is compatible with GPLv2-or-later;
the combined Pro build is distributed under GPL v3.
