Running the CryToolsInstaller
From the Launcher dashboard go to Library → My Engines (expand the menu) Dependencies → Tools and Plugins → CryToolsInstaller. To run the application click on the Install button (you can also run the application via the cog symbol (to reveal in Explorer)).
This will open the application. Click on the Next button.
Selecting Packages to Install
Next, select the plugin packages that you wish to install. Of course what will be installed has to have previously been installed on your PC. The tools automatically detect the supported application versions and where they are installed on your hard drive.
Once you have chosen your packages, click Next button.
You will then get a 'success' (or a 'fail' if something has gone wrong) on the installation of the required plugins. Finally, click on the Close button to complete the install.