Hello,
It is a bit complicated, also the plug-in is a bit buggy in that parameter exposition.
I attach an example preset, assign button/pedal to the control and focus the track with LePou. Pedal/button should switch between Raw and Modern then.
An explanation.
1. you need to "find" the track with plug-in. In the example I just use current focused track. Depending on your needs, that can be changed. You can use some
fixed track and select by number, f.e. first+5 with track 6. You can also use fixed track name, f.e. GTX (you will need to define "TrackName" Set in the options tab,
with "GTX" state, then you can choose it in the Track selection action).
2. we select FX (LePou) on the track and parameter "Mode". Then we try to map it's value (always 0-1 for any parameter) to 3 States Set. That is buggy in this plug-in,
but should work for the purpose. Than we set Value to what we need (modes are 0., 0.5., 1.0). In general you probably want all that as it is.
If you want to copy this control into your existing preset, do that exactly with the same parameters (exporting as text in the Options tab can help you clearly see all
parameters). Don't forget to create Software State Set used.
Sure, if you upload your current preset I can add this control for you. I know that takes some time without experience.