Regretfully, clearing data did not work: any attempt to edit an existing memo results in a pop-up, "Loading... Please wait," that never ends! Force close doesn't work either; it requires a phone restart to clear the pop-up. Also, this broken Samsung app (bloatware) cannot be deleted, reinstalled, restored, or in any other way fixed. I think the only solution is to disable this buggy app and switch my saved memos to an add-on memo app, unless someone has a better idea.