Congo Jnr and RDM

I'm trying to access the personality setting of an Enttec Aleph 1 CV Driver that can only be changed via RDM. I'm using a Congo Jnr (Software 7.1.1.9.035 I/O Firmware 1.3.0.9.5) via the internal DMX ports and I'm not having any luck. I've switched on RDM in DMX settings, and "RDM Discovery Enabled" in Console settings but nothing shows up under RDM devices. I've tried two of the Enttec boxes, which are set up as per the manual for RDM addressing. Is there anything else to do, or any tricks to this?

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