You have to be careful when you are changing your sites url, the link I provided you with was from WordPress.org
The reason the load more was not working is because your tried to change the url in the settings which would of caused the load more to try and load from the wrong link.
I’m afraid we can only help with theme issues and not wordpress general issues, however I recommend using this: https://interconnectit.com/products/search-and-replace-for-wordpress-databases/
Upload the file and run the script. In the find field write the link that you think you have changed your site to, and then in the replace field write the correct link. Keep doing this for any links that you may have tried to change to, until all the links in your database are the correct link.
– Kyle