Simply Works Core 1.5.4 was released today and available at:
One of the most common questions I receive is: “How do I turn off comment?” . I was reluctant to add this feature to the theme since you can turn off comments in WordPress under discussion.
The latest free version as a new theme option section called Page/Post Options. Here you can turn off (or back on) Comments, Author, Date, Categories (filed under in this theme), and Tags site wide, easily without losing your individual post setting, if you ever decide to change back just turn them back on. It a simple “override” that Simply Works!