Question

• Apple macbook pro 
• macOS mojave
• apogee duet

 Impact XT -
preset is read, but it can't be preserved after edit.

It may be the one by which I made a mistake in setting. You tell me a considered factor, please.

Answer 1

You have to save it. See the S1 Reference Manual. There's a smalll piece of paper looking icon to the left of the presets name, left of a pair of left / right arrows. Click on that to Load, Save, etc. presets.