My Libre Office has crashed. If I uninstall and reinstall, will I lose my docs, or will they be retained on the reinstall?

Operating System is Windows 10, on Acer desktop

I can assume you save your documents in the “Documents” file or on your Desktop or a different file besides your Libre Office file? If so you will not lose any documents when you uninstall/reinstall.

All your docs should be retained between uninstall/reinstall events.

You do keep your docs in a separate directory, right ?

BUT you will back up all your docs just in case of any unintended consequences.

HTH

(Thanks for marking my answer as correct, and boosting my karma.)