It's cool they made a Big Ben Quiet mode from 9pm to 9am. That's in v1.3. Do they have any more improvements to make?
According to the information on the developer's website, the version 1.3 brings the quiet mode from 9pm to 9am and besides that it also automatically silents the sounds when you are going to bed. To check for additional feature and any other improvements, access the official website where the software is presented.
Official website: http://www.bigbensoftware.com/downloads.html