How do I change the URLs from this:
http://18f.0df.myftpupload.com/essential_grid/roxy-joseph/
to this:
http://18f.0df.myftpupload.com/portfolio/roxy-joseph/
?
Hello 
Have you tried asking the author of that plugin yet? I’m sure they would have an idea. Here is their support information - https://codecanyon.net/item/essential-grid-wordpress-plugin/7563340/support
Thanks!