Actually there is a workaround for this problem.
You must have uninstalled your drivers at some point.
The 12.6 and 12.8 catalyst drivers are bugged. It's when they moved the AVIVO drivers into the main catalyst drivers.
Here is the solution:
1. uninstall all ATI display drivers (I used the special utility for this).
2. install an old working driver set. I chose 11.10 cause they were good. Now install catalyst driver. Then ALSO install the AVIVO drivers.
At this point the converter should be back.
3. Now update those drivers with version 12.8. Dont uninstalling the old drivers. And remember to update both the catalyst driver (whql.exe) and the AVIVO drivers (...Xcode.exe).
These drivers are broken. They add drag and drop but as you noticed the converter is missing. That's okay. You need the Xcode AVIVO drivers installed for the hotfix to fix them. So don't uninstall anything!!
4. Find and install "ATI Catalyst 12.11 B11 Hotfix 10 P6 V10.7" it works on all OSes. Open CCC and you will see the converter is still not there.
5. Restart your computer. Open CCC. Viola!!! Everything is back.
From now on you can safely update your drivers. The Xcode drivers will mow be a part of the catalyst install file. For example, you can update to 13.1 and get AVIVO improvements. Just don't ever go back to drivers 12.X again!!!
hope this helped