How to stop fake update pop-ups?

I'm running on a Macbook Pro, Sierra, 10.12.6. I fell for the malware that fakes an Adobe update pop up. It's taken a lot of work to get rid of most of the symptoms, but one symptom that persists is the regular fake pop-up of the "update Adobe" window. I know it's fake, because when I double-check updating through the Adobe help, it tells me I'm updated.

I've deleted the Reader application and downloaded it again, but that doesn't seem to help. Anyone know how I can get rid of these last vestiges of the malware? The pop-ups come so often it's a real distraction.

(The malware also occasionally switches my search engine on Mozilla to Yahoo from Google, but I suppose that's a Mozilla issue).

Thanks for any assistance or direction.