Automation for Vst Preset
How do I change Vst Presets with automation (guitar rig, amplitube) ?
Logic Pro X, macOS High Sierra (10.13.3)
If I read your question correctly, I think this should help.
1) Get into automation mode (Button highlighted in blue with connect the dots, or press "A" on your computer keyboard).
2) Click the dropdown arrow on the track you are wanting to automate.
3) Select your VST. In my pic, it's Komplete Kontrol. In your case it would be Guitar Rig or Amplitube.
4) Select the characteristic you wish to automate. In this pic I have resonance selected.