Although it is recommended to use the latest version of the product, versions of FSM Connector and Message Broker are not entirely dependent. This means that it is possible to use the newest FSM Connector with one of the older message brokers and vice versa but certain functionalities may not work.
3070721 - Download of FSM Message Broker
If you want to learn about about Message Broker go to FSM Message Broker installation
If you want to check message brokers' version matrix go to Message Broker versions matrix