I realize there are a lot of other questions like this one. Please don't ignore my request because it is so similar. I have read through everything else I can find on the forums, and none of them seem to address my specific problem.
I am trying to move a WordPress site from 000webhost to Dreamhost. On 000webhost, I made a backup of both my database (via phpMyAdmin) and the WordPress themes, posts, and other files (via FTP). I created a new database on Dreamhost and uploaded the database I had backed up from 000webhost. I edited the wp-config.php file to reflect the new host name, database name, user name, and password, and then I uploaded all the WordPress files via Dreamhost's web FTP.
When I try to install WordPress, I get a message that says WordPress is already installed. When I log in, I am taken to the dashboard for my website on 000webhost. The website itself seems to be hosted on the Dreamhost servers, but I can't figure out how to move my WordPress installation. I'm sure there must be some simple change I need to make in one of the database files, or maybe in the wp-config file, but I can't figure out what it is and I don't want to start making changes blindly for fear of breaking the whole site beyond repair.
What am I missing?!