REW, ADI2 and UMIK2

I am trying to do some room analysis with REW. Soundcard is an RME ADI2, with a UMIK2 as mike.
Trouble is that REW refuses to use the UMIK2 for input. It correctly identifies the RME as the output device, but insists to use it also as input device.
If I look in W10 audio settings, I see the UMIK2 and can set it as the default mike and it tests OK.
I have tried both with RME's MADIFACE driver as well as the Java driver.
Any tips of what I might be missing?

Jan
 
That's what I thought. In fact, I can select it, it shows on the REW Preferences panel.
And if I do the mike test in Windows, it works fine, but when I do the level test in REW there's no in put.
I'm sure it must be something trivial I miss.
Happens a lot with software I haven't used for a while ...
I'll work on it again today.

Jan