1) the address shown on the about us page is set in the power store admin section in the settings panel. It is the store Location address
2) edit the webassist/plugins/cms_templates/news.php page.
change:
<p><a href="../../../page.php?News=<?php echo($row_CMStoRS['ContentPageSetOrder'] ); ?>">Read More...</a></p>
to:
<p> </p>
3) you can add to the horizontal menu by editing the webassist/plugins/main_menu/menu.php page