The plugin menu

These are under Plugins → RAMSES ESP.

Menu item	What it does
Toggle Timestamps in Log (on/off)	Every line the plugin writes to the log starts with the time to the thousandth of a second, which helps when lining events up. This turns that on or off. It stays as you leave it.
Show Valve Battery and Liveness	Writes a report on the radiator valves to the Event Log: how many valves have been heard across how many zones, how long a valve can go unheard before it is called silent, how long the plugin has been listening, one sentence for each zone, any valve heard but not yet matched to a zone, and any valve that is silent, with the hours since it was last heard.
Forget Valves Not Heard For 7 Days	Drops every valve that has not been heard for a week, so a valve you have replaced stops marking its zone silent. The log names the valves it dropped. A dropped valve is picked up again if it ever transmits.
Read Evohome Timetables Now	Reads every zone’s weekly timetable from the Evohome controller now instead of waiting for the nightly read. Each zone’s Timetable state updates within about a minute.
Bring Back Deleted Boiler Relays	A relay device you delete stays deleted. This undoes that, so each deleted relay is created again the next time it is heard.
Show Plugin Info	Writes the plugin’s version and details of your Mac and Indigo to the log, which is useful to include if you ask for help on the Indigo forum.

A valve can be heard before it is matched to a zone, because only some of the messages a valve sends say which zone it belongs to. It is matched as soon as it sends one of those.