In this version we have implemented several stability fixes, that prevent a PHP error in case the Navigation Badge add-on is configured to show the number of unread posts, but this add-on is de-activated. Now the number of unread posts will continue being shown without any issues unless you disable the badge from Navigation Badge addon.
The bug of not updating unread post count when forums are marked as read is now fixed.
We have also implemented a new option right under "Unread Post Count Cache" option, that allows to hide the badge in What's New tab if the number of posts is 0. This option is selected by default.
Feel free to suggest further enhancements for the add-on or report any issues you have and they will be addressed asap.
Please consider posting a review if you are using the add-on and let us and other users know how it works for you.