Well, theres 2 UBB's... Theres UBB.Threads and UBB.Classic...
In either case, to get to the latest version, you have to upgrade to the latest 6.x build of THAT software, then "import" to UBB.Threads7.
If you don't feel comfortable with doing this yourself you have a couple of options:
1. Hire a developer (such as myself) to upgrade you.
2. Hire Groupee to upgrade you.