Hi Angela,
We improved compatibility with bbPress plugin in Rating Manager v1.2. There are some new settings fields to enable or disable ratings for forums, topics and replies. See this screenshot: https://www.elementous.com/wp-content/uploads/2016/12/bbPress-rating-settings.png
Please download the latest version of Rating Manager from “Premium products” tab (page) from your account, then disable ratings for replies by unchecking “Reply” checkbox.
Let me know if you have any more questions.