editing wordpress default footer

if you don’t need any part of your text linked to anywhere, try to replace this section in colophon.php:

<a href="http://wordpress.org/" title="<?php esc_attr_e( 'A Semantic Personal Publishing Platform', 'forever' ); ?>" rel="generator"><?php printf( __( 'Proudly powered by %s', 'forever' ), 'WordPress' ); ?></a>
		<?php printf( __( 'Theme: %1$s by %2$s.', 'forever' ), 'Forever', '<a href="http://theme.wordpress.com/" rel="designer">WordPress.com</a>' ); ?>

with:

Mais La Copyright 2012. All Rights Reserved.

if that does not work, please post in the theme’s forum at http://wordpress.org/support/theme/forever/

I am having the same problem with trying to edit my footer.
I had this developed by another business! i have tried appearance – editor- footer.php. & i cannot find where to edit anything… it just has coding about left or right, font etc.
I want to edit my web address, get rid of the name of the last developer, and update my copyright. Can you please give me step by step instructions?
Thankyou