The documentation found on the Towny Wiki is updated every time a Release version of Towny is put out. If you are using a development build it is expected that you have read the changelog for any important changes since the previous Release build.
Some important pages to look over:
If you still need help, join us in our IRC channel #towny on the Esper.net network. If you are a server admin that wants to get cutting edge updates on the development of the plugin and want to help test things before they become public, join us in our Discord server