I accidentally deleted the “Blockquote” formatting preset, and I don’t have a blockquoted section in the document right now to “create new from selection”. Is there a way I can reset the presets to the default-install versions?
This thread should answer your question. Please note that resetting the presets means resetting them all—you will lose any custom presets you’ve created, so make sure to “back them up” to paragraphs, first.