Moved Directory / 404 Problem

I installed WordPress on my Yahoo! SmallBusiness account. I previously had an HTML template site.

When I created the WP installation, I chose not to make it my root domain, as I wanted to create the site at my leisure. So it got installed under:

http://www.inpiano.com/blog/

Once I completed the site, I moved it to my root directory as directed here:

http://codex.wordpress.org/Moving_WordPress#Moving_WordPress_Within_Your_Site

Immediately, my home page was up and I noticed Image links broken. I used the Update Links plugin and fixed the broken images.

However – and this is the part that is maddening… Anytime I click a page in the menu or linked from the main page (in the blurbs below my header) I get a 404 error.

Here’s what I’ve tried:

1- Turning on Customizable Permalinks and then going into Permalinks and switching from Post Name to Default and then back to Post name

2- Locating my .htaccess file and editing it… I used Filezilla but could not locate it… even after I checked Server > “Force showed hidden files”

3- I created a brand new page from scratch from within the WP Dashboard Pages > Add New

When the new page was created and I selected “View”… it got a 404 error! The page wouldn’t show up.

4- I downloaded the Yoast SEO plugin and tried to edit the .htaccess file from there… there was nothing in it, so I copied and pasted this into it and selected save changes:

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

When I navigated away and came back… this was missing! Every time I add it and select save changes it does not stay in.

5- When I tried creating a .htaccess file directly through FileZilla onto the server, I got a 553 error (Prohibited file name)

Help!

The Web address is http://www.inpiano.com