Plugin changed my “www”-prefixed URL without asking

Just for feedback, don’t need help with this. I just installed this plugin simply so that I could use the llms.txt function. After activating the plugin my site url was changed from https://www.sitename to just https://sitename. So the www prefix was removed. Can you please investigate this?