I am VERY familiar with being able to manipulate Google results regarding your own site. Yes, you can.
I have been to the paint.net site several times, and it's not being made clear the that free download is for free software, considering it's not marked as free elsewhere (Microsoft Store, downloads.cnet.com, etc.)
Hopefully, someone other that the person I'm replying to is in charge of paint.net's site.
Good bye.