D6 Pro on XP Personal thinks its D6 Personal

Hi,
I've got a version of Delphi 6 Pro which I haven't had time to install at work. So I took it home, installed it on Win XP Personal (running as Admin), installed the "good" 6.01 patch, and registered the software. Now D6 Help | About tells me its Delphi 6 Pro, but Pro options like Class Completion, and extra tabs in Tools | Environment are missing. Any ideas?
Thanks,
  Andrew.