The GPL

Proview is licensed under the GPLv2 with an exception

You should have received a copy of the GNU General Public License

If not, see <a href="http://www.gnu.org/licenses/gpl-2.0.html" target="_blank">GPLv2</a>

Linking Proview statically or dynamically with other modules is making a combined work based on Proview. Thus, the terms and conditions of the GNU General Public License cover the whole
combination.
In addition, as a special exception, the copyright holders of Proview give you permission to, from the build function in the Proview Configurator, combine Proview with modules generated by the Proview PLC Editor to a PLC program, regardless of the license
terms of these modules. You may copy and distribute the resulting combined work under the terms of your choice, provided that every  copy of the combined work is accompanied by a complete copy of the source code of Proview (the version used to produce the combined work),being distributed under the terms of the GNU General Public License plus this exception.