Well,

this is my problem -

I'm running a vBulletin powered board, with MySql (now running MySQL 5.0.67)
two years ago We've tried to convert our database using a script (http://www.vcharset.com/)

we've converted the DB, and got a utf database, we used to have latin1 Collation in our tables.

the problem was that the content inside the DB wasn't in Hebrew, it was a lot of gibberish, we've followed the manual, and the content is showing in Hebrew on the forum.

Recently I've seen another forum's DB, coded to UTF8 to, but you could see Hebrew content inside the DB. we have a few problem on the site because of the gibberish, I want to reverse what we did, or fix the gibberish problem (some how).
How do I do it? I'm using phpMyAdmin to explore the DB.