To rename the server root and all relative paths for posts and images follow these steps:

1. Rename the server root itself or the site folder on localhost

2. Open a MySQL tool:

• Command Line

  

• PHPMyAdmin

  

• HeidiSQL

  

3. Select the database

4. Rename it if you need

5. Run these SQL commands:

update wp_options set option_value=replace(option_value,'[old]','[new]') where option_value like '%[old]%';
update wp_postmeta set meta_value=replace(meta_value,'[old]','[new]') where meta_value like '%[old]%';
update wp_posts set post_content=replace(post_content,'[old]','[new]') where post_content like '%[old]%';
update wp_posts set guid=replace(guid,'[old]','[new]') where guid like '%[old]%';

where

[old] - old server root name
[new] - new server root name

6. Load the site.