MQTT.fx 0.0.10 was released.
New in this version:
Option to copy the message payload to clipboard
Service menus at publish and subscription panel: now you can clear received messages buffer and the recent topics lists
Extended logging to mqttfx.log
Added Application Window Icon (for Windows)
Now running/bundled with Java 8u20
Updated 3rd-party libs (e.g. ControlsFX 8.20.7)