My Site is Gone

I was trying to move my site from localhost to live server so I changed the WordPress URL and Site URL settings from http://localhost/mysite to http://mysite.com in Settings -> General.

Now I can’t get the site back. When I try http://localhost/mavenedge it gives me a 404 error.

I’ve gone blind and can’t see straight.

A lot of work was done to customize the theme and stuff.

Is there any way for me to get the site back?

Many thanks.