How do you store and/or access the presets on the Apmlifi 150? I can only access the four that come onboard from the factory, except via the Remote app. Pushing and holding the tone button on the amp to set one of the four presets (A B C or D) does nothing.That's not covered in the manual that came with the amp or the "full version" of the manual available online, which is exactly the same as the printed one.