Making WordPress Local Again?

I think what you need to do to get the local install back up and running is either edit some database files manually, or make a couple changes to the wpconfig.php file in the root of your wp install.

check out this codex page for instructions on editting this file.

You will need to make sure your database credentials are correct of course, but you will also want to set the site_url and I think the Blog Address.

After the local install is back up and running, you should be able to access the settings page again, and set these 2 addresses properly, after which you should remove those lines from wp-config.