Domoticz

Ooh that's interesting - hadn't realised you could set the modes through Domoticz. It really is the gift that keeps on giving!

ARC...
"klik-aan-klik-uit" (kaku), Coco, Intertechno and many others are brand names that all use the same protocol.
The old version of kaku had rotatable code wheel switches. One for the house code, one for the unit code. Both allowed for 16 settings each. These are to be used with the 'ARC' setting. (R stands for that rotary code switches)
The new version of kaku has a learn button on the switches and random house codes. These are to be used with the 'AC' setting.

Has anyone got RFXcom+Domoticz to see the Energenie remote?

I can answer my own question now.
Today RFXtrx started adding switches for the remote.
They are Lighting4, one for each of the 10 buttons.
All only show an 'On' event when the button is pressed, even the 'Off' buttons!

Oddly, RFXtrx is not reporting them any more.