From RadPHP XE2 Documentation
Use this dialog box to specify the design time packages installed in the IDE and the runtime packages that you want to install on your system for use on all projects.
|Installed packages||Lists the design time packages available to the IDE and all projects. Check the packages you want to make available on a system-wide level. You do not need to have a project open to install packages on a system-wide level.|
|Add||Installs a design time package. The package will be available in all projects.|
|Remove||Deletes the selected package. The package becomes unavailable in all projects.|
|Components||Opens the "Installed Components" window where you can review the list of components in the selected package.|