OSCommerce install Error

I removed the "install" directory as required after the installation, but still receive:

Warning: Installation directory exists at: C:/wamp/www/osCMax2/install. Please remove this directory for security reasons.

Edit: catalog/includes/application_top.php

Neer the bottom is:
define('WARN_INSTALL_EXISTENCE', 'true');
Change to:
define('WARN_INSTALL_EXISTENCE', 'false');

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