Im still on 5.5. That looks like something , like a plugin failed to load, reminds me of how the magic bullet buttons looked like when i used after effects bridge, allowing me to use after effects filters in edius, thats how the plug ins interface translated within edius, and though Im not sure if there is something wrong or your just missing something since Im not v6. But I'm just sharing how i encountered a a similar scenario in v5.5 and it was the bridge not translating the GUI of a plug in meant for after effects inside edius.
yes, the white balance filter was renamed "3 way color correction " I believe. It should behave in the same way.
I may have to go back to version 5 and see if that function works properly there. Hmm...
try a clean reinstall. Uninstall your edius, clean the registry, then install again. I think its a plugin malfunction. Probably in conflict with a previous version, if you had v5 before.
Also, disable AE Edius Bridge. Some AE plugins cause problems in Edius 6 even though you have not placed any on the timeline. I had an issue where none of my clips were/would link to the source media.