I installed ChemDraw Ultra 6.0, but when I launch, ChemDraw, Chem3D and ChemFinder, it asks me for the codes. The codes only work with ChemDraw and not with Chem3D and ChemFinder.
You should never be prompted for codes when launching an application. You should only be prompted for the codes during the installation. The codes are only meant to work at installation of the ChemDraw Ultra suite. The Chem3D and ChemFinder applications that come with ChemDraw Ultra are version 5.0, where the ChemDraw application is 6.0. The codes are 6.0 codes, so they will only work with ChemDraw at start up. Try uninstalling the software using the Add/Remove Programs control panel, make sure you are logged on as an Administrator to the machine, then reinstall the software and retest the applications while logged on as Administrator.