I just remembered there was a system bug turning notifications ON yesterday that took me hours to uncover, so putting two and two together, if you already had them ON then they probably couldn't turn OFF either. That makes sense. That should already be fixed in the new version. Please update and then let me know if the problems exist. If so, I'll fix right away. Thanks for reporting!
Yesterday was a very frustrating day for me because the bugs I'm dealing with now are mostly not related to logic or a typo (except that one rename issue), but a bug in certain versions of Android. System bugs are notoriously difficult to discover and fix. It's a good sign that I'm at least able to focus most of my time on such things though. You would think a Boolean value like On/Off (true/false) would not be something that could go wrong, but you'd be mistaken when it comes to Android heh.