wp_sam

Other way is to go to your phpmyadmin database find wp_option table and change the URL back to what you have before.

You should check with both plugin support, they will help you for sure.

try this :

Connect with your FTP and add these two lines to your wp-config.php, where “example.com” is the correct location of your site.

define(‘WP_HOME’,’http://example.com’);
define(‘WP_SITEURL’,’http://example.com’);

OR

1. FTP to the site, and get a copy of the active theme’s functions.php file. You’re going to edit it in a simple text editor (like notepad) and upload it back to the site. Take a back up of function.php

2. Add these two lines to the file, immediately after the initial “<?php” line.

update_option(‘siteurl’,’http://example.com/blog&#8217;);
update_option(‘home’,’http://example.com/blog&#8217;);

Use your own URL instead of example.com, obviously.

you can see this URL for more help – http://codex.wordpress.org/Changing_The_Site_URL

Kindly check on very top right hand side of your All post WordPress backend you will see a screen option there. Click on it and remove the option you dont want to see. see this sample link http://cdn2.4rapiddev.com/wp-content/uploads/2011/03/Wordpress-Screen-Options.jpg

Hope this will help.

Yes you can install WordPress on one domain under different folder. For each site you need to create different database as well.

I would suggest to have your web team do this changes, cause its dynamically showing the logo and open.png and thats needs to be fixed in header.php file and checkout file.

I hope this plugin will help you http://wordpress.org/extend/plugins/widget-logic/. this plugin gives you control on widgets