...The connector is built using the source tree code from the LibreOffice project, and released under the GPL2. See License file within extension for more details. For the source code, please go to the LibreOffice git repository :
http://cgit.freedesktop.org/libreoffice
Folder numbers correspond to the version of LibreOffice for which the connector has been built.
There is absolutely no guarantee that a connector built for a specific version of LibreOffice, will work with another lower or higer version of LibreOffice. in other words, they are version specific. ...