This release adds mySQL support in order to allow multi-server support. You can enable in the config.yml as well as setup the database and authentication settings.
Note: switching between persistent data storage and mySQL does not convert data from one format to the next. Balances may be zero if the backend is used for the first time.
This release also defaults to using the minecraft:dead_bush instead of the minecraft: poisonous_potato for the example in order to prevent eating currency.
Addition support for optionally disabling use of currency items was added in the config.yml.