Best way to reset theme to look like demo?

OK, so – I installed GeoDirectory and the framework, and a child theme. All looked more or less like the demo and I was working on customizing it and adding data when I thought I would experiment with swapping out an “under construction” one-page type theme so that the page wouldn’t display confusing data when I wasn’t working on it.

And this may or may not have caused my problem, but swapping back to a child theme, it appears that several widgets don’t have things in them as they should. A lot of content is either duplicated or missing. No great harm done at this point, but…

Is there a “restore default” button anywhere in the control panels, or would deleting and reinstalling the framework and child theme do it?

Also, what’s going to happen if I experiment with swapping between different child themes?