The notes for the new version include 'Add 'automatic updates' checkbox to update dialogs for quick application of silent, automated updates for future events'. The past few updates, there have been an unchecked tickbox marked 'Automatically keep up to day', but after checking it the first time I saw it, every subsequent auto-update window appeared with it unchecked. I don't know if this is the tickbox the change note is talking about, but I don't see any similar option in the 'Updates' drop-down menu on the main PL window.
Fixed in latest beta.