After playing around with it a little more, I figured out that turning the big knob while it is pushed in, goes through the subcategories (mono, stereo, legacy) and if I go all the way to the beginning, I get the icon to push the big button to go to the model list at the top level. I’d still appreciate if someone can confirm this is how it is supposed to work. Also, this happens when trying to modify a block on an existing preset, not on a blank preset.