Change URL from Subdomain to main level, troubleshooting plugin? :(

Hello community,

hopefully you can help me. I’ve created a wordpress system on a subdomain release.thaulle.com , finished the website and now redirect it to the main url thaulle.com

On thaulle.com there is still a exisiting wordpress system, but i uploaded a index.php with these configuration:

<?php
/**
* Front to the WordPress application. This file doesn’t do anything, but loads
* wp-blog-header.php which does and tells WordPress to load the theme.
*
* @package WordPress
*/
/**
* Tells WordPress to load the WordPress theme and output it.
*
* @var bool
*/
define(?WP_USE_THEMES‘, true);
/** Loads the WordPress Environment and Template */
require(?./release/wp-blog-header.php‘ );

I also changed the site url in the wordpress backend. Everything is fine and the website is working, but unfortunately some strange problems appeared:

– i cant change any picture (will be not displayed)
– some important navigation are missing from plugins (they are working but in backend i cant configurate them anymore…)

What can i do? If i reset the plugin, all settings will be lost (a lot of afford :o) – maybe there is a technical workaround or something else to solve all problems?!

Would be really awesome if you can help me , thanks a lot !!!