Failed move to subdirectory help

So I had to quickly move a site from a main directory to a subfolder after the url got out to the public prematurely. I kind of panicked and moved all the files besides htaccess and index.php but forgot to change the urls to blog within the wp-admin settings. Now I am unable to log-in to the site.

So i changed the index.php file to reflect the new folder :
/** Loads the WordPress Environment and Template */
require(‘./tester/wp-blog-header.php’);

is there some way for me to recover access to the site? Do I need to change something in wp-config.php? Anyone who can help me out I would really appreciate it.