Hello,
after downloading your excellent plugin, and trying customizing the standard, non responsive themes, I gave a try at customizing the responsive one. I noticed that, for example, adding new files in the blocks directory actually makes them appear in the sidebar but, as far as I understood, an update would render them unavailable. Tried the same approach of the non-responsive themes, building a parallel “extension” folder, with little success.
Can you confirm that extending and customizing the responsive theme safely is not a feature in the current version?
Thanks!