The functionality you are seeking in not in this current version of the software. With our small group (two) and limited time and resources to put toward a free and not for profit component such as this, we have to focus our energy.
Thus far the largest driving factor for Simple Review has been to create a review component.... which is NOT the same as a rating component. Our initial niche market was for users and sites who wanted to create an online catalog of products, items, places, etc by rank. Much like Consumer Reports (for almost anything), PC Gamer Magazine (Game reviews), or Sardless.com (Music). Sites with one person, one group, one team, or just one site creating the reviews for all users to see. Allowing user comments and ratings was thrown in as a useful addition but was not the main focus as many components existed for that type of feature.
As we continue down this path we are expanding our ideas and discovering what people desire. You should see big and exciting changes in the next big release which will include a great deal of requests made by users including the features you are asking about. Check our the request list in the request forum.
I hope you can find Simple Review suitable for your needs and that we can introduce new features to help your site be perfect.