Sometimes user does not like the feedback review theme and he wants to make changes in theme, which is very easy for a user to change the theme.
selecttheme

Here some easy steps are given to change the theme of feedback option:-
Step 1 First click on Settings menu of Was This Helpful Plugin
Step 2  Now scroll down the back-end Settings page on Theme section
Step 3 Select your favorite theme layout.
Step 4 Click on Save Settings button at the bottom of Settings back-end page.

Now Check this theme layout at your post or page where your applied feedback review at front-end.
selectthemefrontend

Your favorite theme layout displaying at yes(heart) and no(broken heart) button of feedback review.

Video Tutorial