> you can't create an empty table Ok, I'll add check to prevent it. > Is there a way to save database changes, or does that happen automatically? It does automatically on each value changing. You could start transaction explicitly by execute "begin transaction" before data changing. And after commit or rollback all changes. > The "save" icon (for save query) looks permanently grayed out, but it actually saves queries. I'll recolor icons to avoid this misunderstanding. Thanks for remarks!