Just picked up my system. SW version 6.01.01.38R3.
It looks like I was able to activate the IQ function entering the code the script generated via the screen.
I do not see the counter anymore when choosing IQ waveform, so I assume it worked.
Next the freq option, but I guess that can only be done via the network interface.
Happy with it, as I use the system for hobby and would like to learn but not build commercial systems.
Would also be happy with the system without it but very nice to play with it.