If you have translated or modified the .po files, which are used to display text in the control panels, or the online Help files, back them up so that you can refer to them later. Existing online Help and .po files might be overwritten during the upgrade process.
To back up .po files, back up the <install_dir>\cp\admin\resources
directory; to back up Help files, back up the <install_dir>\cp\admin\help
directory where <install_dir> is the location of the Parallels Pro Control Panel installation directory. If the default settings were used during installation, these directories are:
C:\Program Files\Ensim\WEBppliance\cp\admin\resources
C:\Program Files\Ensim\WEBppliance\cp\admin\help