Good advice.
Save Options to file saves all Scrivener options. Save Theme to file saves a subset of options related to Themes. To do a quick save prior to uninstalling/reinstalling Scrivener, Save Options to file is sufficient–that’s what I do for every beta rev. I also periodically Save Options to file for general backup purposes, so I have something to fall back to in the event of an unplanned reinstall…
See this thread for the explanation: [url]What's the difference between those two?]
Best,
Jim