Url error

Hi there.

I have just taken over 4 website and I am having problems with the one. I have one page that is a php template and the page is not displaying correctly on the one website but perfectly on the other website, this means the problem is not the actually php. After a lot of searching and looking I see that the one plugin the site tries to load is pointing to the incorrect url (still points to the localhost).
This, as far as I can see, causes a javascript conflict and the javascript in the page does not run.

I have changed all localhost entries in the database to point to the correct url. And I have download the whole website (files) and did a search for the incorrect url and got no results.

I am currently out of ideas as to where to look further, any ideas would help!

Page that works correctly: https://www.regenesys.in/video
Page that works incorrectly: https://www.regenesys.co.za/video
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The error is for trying to load the nextgen-gallery plug in.
This is one of the errors I get, there are 8 similar errors

GET https://localhost/regenesys-rebuild/wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/lightbox/static/fancybox/jquery.fancybox-1.3.4.css?ver=3.7.1 [HTTP/1.1 404 Not Found 1ms]

Mari

https://www.ads-software.com/plugins/nextgen-gallery/