WP 3.0 and upgrading Support System

Hi guys,
I'm running Support System on my WP 3.0 install, just upgraded from WPMU 2.9.2.

Anyway I am have a bit of trouble with the support system so I'm assuming it needs upgrading to the WP 3.0 version. Is it ok just to copy over the files like a fresh install? I don't want to lose any of my pre-existing tickets.