Hello Marcus,
I am currently using 4.2.0.0. I found that verson 3.7 would not work on my device(I am using ubuntu 20. I have also tried version 003-005-001 of uhd since that was an iteration used previously by someone prior to me.
uhd_usrp_probe --args type=n200 gives this...
Error: LookupError: KeyError: No devices found for ----->
Device Address:
type: N210r4
Here is a screen grab on the frequency display in gnuradio.
Thanks,
Joseph