Ask HN: I was hit with a patent troll lawsuit, how do I deal with it?

This particular patent troll has filed lawsuits with at least a dozen of my competitors in the past year. Some were voluntarily dismissed, some ongoing, rest unknown (based on my limited research skills). The patent in question involves downloading a remote database to a mobile device used as a lookup table when scanning a QR code. Yeah...

I'm a one person company and have no idea what to do.