You will need to uninstall ComponentOne Studio for WinJS before you install new versions of the suite. Complete the following steps:
1. In Visual Studio 2012, select Tools | Extensions and Updates.
2. Select ComponentOne Studio for WinJS. An Uninstall button will appear next to the name.
3. Click the Uninstall button next to ComponentOne Studio for WinJS.
4. Select Yes when prompted to confirm uninstallation. The studio will be uninstalled.