Is there a way to export the
Custom Settings for Adjustments Palette that I used in the editor view of NX2?
With all 3 Develop edit panes, and the Adjust edit pane, closed, control-click in the space beneath the closed Adjust pane. You will see a contextual menu appear, where you can save (and load) settings.
This copies settings from all Develop and Adjust panes, but you can save/copy after editing only those settings that you want to apply later.