You must have administrator privileges to the computer or at least have necessary permissions set to upgrade the software.

To upgrade a single user installation, install the new version and upgrade your profile. 

To upgrade from 3.6.1, 11.0, or 11.1:

1. Follow the instructions in the Installation & Administration guide for a single user installation, and be sure to install the software in a different location.
    
2. Launch the 12.1 Developer. When you open your profile, you are prompted to upgrade it. The content is copied into the new content location, and the content for the previous version, while still on your computer, can no longer be accessed with the profile.

Note: Once you have upgraded, you can uninstall the previous version through Add or Remove Software in Control Panel. You must delete the old content location manually through Windows Explorer.

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