Hi @netvilox,

If you're a developer you can customize wpForo template as you like and replace the like icon with the heart one. 

An update safe way for such customization is described in this doc: https://wpforo.com/docs/root/forum-themes/theme-customization/

If you're not a developer below is a simple code that allows you to make customization:

1. The following js code should be added in the active theme's js files. 

jQuery('.wpf-like-icon > i').removeClass('fa-thumbs-up').addClass('fa-heartbeat');

2. Put the CSS code in the "Custom CSS code" textarea, located in the dashboard > Forums > Settings > Styles admin page: 

#wpforo #wpforo-wrap .wpfl-4 .wpf-content-foot .wpf-like i.fa-heartbeat {
   font-weight: bold;
}

Delete all caches and check again. 

There are many files in js

Pls specify. 

Posted by: @sofy

The following js code should be added in the active theme's js files. 

Pls specify