Install add-ons for Pro licenses
If you purchased individual add-ons, see here
Go your Account area and get your Sunshine Pro license
In your WordPress admin area, go to Sunshine > Settings > Licenses and enter your Pro license key in the respective field
In your WordPress admin area, go to Sunshine > Add-on Manager. Select and add-ons you would like to install.
Do not install all the add-ons! You don’t need every single one, I guarantee. Only install the ones you will actually be using.