If I were you, I would make certain I had these backups stored in a safe place:
current SQL database export
previous (relaunch) SQL database export
current/previous /wp-content/ folder and contents
current wp-config.php file
current .htaccess
Then at that point I would delete everything from "public root" other than your current /wp-content/ folder and contents and your wp-config.php file.
Following that, I would download and unzip a fresh copy of WordPress and then upload everything other than /wp-content/.
I would next drop all tables from your database and then re-import your previous (relaunch) backup and then again do the SQL update for your URL in one shot.
note: I am hoping all the poking around is what broke your user entries and/or whatever else is not working.
Option Two: *Copy* (do not move) things back to /relaunch/ as they were (including database) and get that working again to see what you have. If that looks better than at present, then use Dashboard > Settings > General to make the URL change and then go back out to 'http://www.jessicavoiceover.com' and see what you have.
note: To actually do that safely, I would first add another database (assigning the same SQL user) for /relaunch/ and then edit the wp-config for /relaunch/ to only use that new database.
edit: Off to take a nap!