I am trying to install an object enabler on ADT 3.3 (mep3oe.msi, the one that allows ADT 3.3 users to see building mechanical desktop objects) but it is telling me that previous versions have been detected so it cancels the installation. I can't find any other enablers. There was a previous attempt to install the enabler and service pack by someone else, they had trouble getting the pc to work afterward so they uninstalled everything and took the pc back a few days to previous settings(WINDOWS XP)so it would work properly again. I can not find any other enablers on the pc. How do I find it or get around this conflict? Thanks, Jason.