To enable "Reviews" for all products at once:
  1. In the administration panel, go to Products > Products.
  2. Select 100 in the Total items option (click on the number link near the option and select 100 in the small section appeared).



  3. Select the left top check box (all products will be selected).
  4. After that click the gear button and select the Edit selected option.
  5. Click on the Unselect all link in the opened Select fields to edit window.
  6. Select the Reviews check box in this section and click the Modify selected button.
  7. Click on the Apply values to all selected products link at the top. A new small section will be displayed.
  8. Select the Reviews check box and select Communication (Rating or All) in the select box near to it.
  9. Click the Apply button. The selected value will be applied to all the products.



  10. Repeat points 2-9 if needed.