I can't help you (and I don't use notify), but maybe the Watchlist is easier in the future:
I don't understand why anyone would not use the watchlist. You can configure the watchlist to be exactly the same as "show new replies to your posts" by configuring your posts to be auto-watched and adding your posted-in topics to your watchlist. After this is done, you can unwatch topics that you don't want to see.
Before I read this, I used Show new replies to your posts.. Watchlist is much better