4
I believe you can.
There is a
downgrade script that you can use.
In my personal experience, by the time I got around to the downgrade, too many people with too many permissions tried to fix what wasn't broke. To make a long story short. I ended up trashing the database and start from scratch. The lesson that I learned, keep a tight reign on the permissions.
Some dream of success, while others wake up and work for it.
--unknown