Domoticz

I have purchased an RFXtrx433 E USB 433.92 MHz transceiver (RFXCOM-E).
But Domoticz shows me without E

RFXCOM - RFXtrx433 USB 433.92MHz Transceiver
Version: Ext/1021

Which fw do I have to use?
http://www.rfxcom.com/epages/78165469.sf/nl_NL/? ObjectPath=/Shops/78165469/Categories/Downloads

RFXtrx433E Ext Firmware
RFXtrx433 Type1 Firmware

My Domoticz doesnot show the 'E' either.
Use the firmware from: http://www.rfxcom.com/WebRoot/StoreNL2/ ... rmware.zip if you have the 'E'