Keeping previous versions installed when installing CC 2015 applications

By default, when you install a CC 2015 version of an application using the Creative Cloud desktop utility, previous versions of that application will be uninstalled, leaving only the most recent version. For example, by default, installing After Effects CC 2015 (13.5) using the Creative Cloud desktop utility will uninstall After Effects CC 2014 (13.2) and After Effects CC (12.2).

If you want to retain these previous versions during the installation of CC 2015, then you need to deselect the Remove Old Versions option in the Advanced Options section of the updater interface.

You can choose to reinstall previous versions at any time by following these instructions.

Here are some reasons that you may want to keep the previous version around for a little while, with some tips for how to manage the migration to the new version: