Useless for blog post since latest Google update

I am also using this plugin and I also lost all ratings a short while ago. But, I don’t think that it is related to Google’s update since there are many sites that still have ratings such as allrecipes.com.
Maybe something was changed in the last version of the plugin that stopped the ratings showing?
Maybe the developer can reverse this?
I did a search for all sites that I know use this plugin and they have all lost their ratings but as I mentioned other sites still have ratings.

I just stumbled over your post and maybe this could solve some confusion:

Things have changed now and stars will only be shown as rich snippets in the following schema:

schema.org/Book
schema.org/Course
schema.org/CreativeWorkSeason
schema.org/CreativeWorkSeries
schema.org/Episode
schema.org/Event
schema.org/Game
schema.org/HowTo
schema.org/LocalBusiness
schema.org/MediaObject
schema.org/Movie
schema.org/MusicPlaylist
schema.org/MusicRecording
schema.org/Organization
schema.org/Product
schema.org/Recipe
schema.org/SoftwareApplication

Source: https://www.premiumleads.com/en/why-stars-rating-disappear-in-googles-serps/