The free features you provide are meaningless! The free version is in the trial phase, at least 14 days of trial, all functions should be open. To test whether there is a problem, the key is whether the loading speed is displayed at the same time as the other content on the page or gradually displayed. This is very important), just to limit the number of imported products and the number of comments for each product, especially the developer’s logo cannot be added. If we are not satisfied with the trial, there will be no big deal. The premium version is expensive, and it is recommended not to exceed $5 (after all, the functions are relatively small), which is beneficial to the development of your business.
When I test the writing of a review and I want to select 4 stars, they remain grey and do not become yellow.
Jean, I just left a 4 stars review in your store and all went fine. check the video I recorded for you https://www.loom.com/share/b9bf773c9ac14b718ddcbf9f846bd743
I would suggest to clear cookies/cache and try again.
Let us know if you still face issue.