Great! I should have mentioned the other two modules since I had to do those as well.
As for starting over with a new database, you probably haven't harmed the existing one but you can either
- get rid of the existing one (back it up first with mysqldump just in case) by issuing a DROP webwork; command in mysql
- create a new database, say webwork24 in mysql and edit global.conf to point to the new one.
You'll need to run ww_upgrade on the new one in either case.