One last question.
Do I need to include the commercial license for this plugin (and your other plugins) in the game files?
No, you don't need to include the commercial licence in your game files. As outlined in the plugin's help file, my terms are clearly stated. As long as you're aware of the licence and comply with its terms, you're free to proceed with using the plugin in your project.
Once your project is complete, it's recommended that you compile and protect your game to prevent unauthorized access to your project's code and resources. However, please note that this is not a requirement at present, but rather a best practice to safeguard your intellectual property.