Yes, I did all of that (and cleared my cache several times in the process). Actually, I went on to try to manually upgrade WordPress (even though I had the latest version). In the process of doing that, I brought my website down.
Now when I try to get to my website, I get this message:
Warning: require(/homepages/5/d354198350/htdocs/wordpress/wp-includes/load.php) [function.require]: failed to open stream: No such file or directory in /homepages/5/d354198350/htdocs/wordpress/wp-settings.php on line 19
Fatal error: require() [function.require]: Failed opening required ‘/homepages/5/d354198350/htdocs/wordpress/wp-includes/load.php’ (include_path=’.:/usr/lib/php5′) in /homepages/5/d354198350/htdocs/wordpress/wp-settings.php on line 19