URL problem

Hi, I installed the Related Post plugin when I was working in my blog with a local host (my computer), so all my URL were like : http://localhost:8888/name-of-the-article

Now I bought a .com domain and import my database with my settings and plugins in my new website and everything is perfect, except the Related Post Plugin. I still seeing it but we can’t see the thumbnails of the articles in the plugin and when we click in the articles, it stills send us to the local URL address : http://localhost:8888/name-of-the-article, and now my URL are like : http://www.mysite.com/name-of-the-article

My website is : http://www.pausaycafe.com and you can see the plugin in the articles.

Is there a way to update URL in the plugin? or did I make a mistake somewhere?

Thanks!

https://ww.wp.xz.cn/plugins/wordpress-23-related-posts-plugin/