I have to admit (and have readily acknowledged in the past) modulator learn is a bit of a pain…
Ive described this process before (im sure its on this forum somewhere)
the underlying principle/mechanism is identical to midi learn/unlearn… so make sure you are clear on how to use on midi first (as its much more obvious… particular unclear)
so the principle is…
a) setup a modulator e.g. LFO , but be VERY sure it doesn’t hit zero (at this time!)
b) turn off ALL other modulators
c) navigate to module / page you want to modulate
d) activate modulator learn
e) turn param you want to modulate
f) de-activate modulator learn
you have to do this very precisely…
you can see that this is the same as midi learn, but the ‘issue’ is, you can’t easily start/stop the modulators, so it’s very easy when you are in ‘learn mode’ to accidentally start modulating other things.
again unlearn is the same a midi unlearn- it works on the principe that the if a modulator hits ‘zero’ it will unlearn that parameter.
as Ive said previously, this was a ‘quick implementation’ (due to using the same mechanism id already had for midi), and whilst it worked whilst I was testing it for single parameters… i realised as I came to release it was easy to get into confusing states when you used it with more parameters.
but it was too late to do anything at that stage … so choice was leave it in, or remove it totally.
I knew even then, that I wanted to replace it with a mod-matrix solution - but that requires a lot of changes in the code - as the UI its pretty complex (layers of module selection -> parameters)… I just need time to actually implement it
I don’t know what your issue is with save/recall presets - thats works as described afaik.
(again perhaps search forum, I know some people had issues, which I cleared up the misunderstanding on)