Hi James,
You can download the jdbc jars on the official site of postgresql here:
https://jdbc.postgresql.org/download.html
Kind Regards,
This is the jar file I will download in the userlib directory.
This is my microflow:
I found youtube can explains step by step of using Database Connector.
Hope will help.
https://www.youtube.com/watch?v=eJVFyDONU9Y
Remark: I also stuck about using Database Connector to connect mssql (Error = Failed to get driver instant)