Version 3.2.07 introduced a new global export feature that allows you to export all of your templates, settings, menus and styles in one file.
To access the global export, navigate to the uiBuilder and click the tools icons in the top right and then select Gloabal export:

After clicking you will get a window with some options on what you would like to export, once you are ready click export and uiPress will export everything into one single .json file ready to be imported into another site.
