Pop-up notification to upgrade, is not going away

[Airflow]

I keep getting a popup every 45 seconds asking me to upgrade. So I did. The stupid popup will not go away. My computer says there is nothing left to upload but that box keeps popping up. I cannot get any work done. 

[Hannah]

Hey @Airflow, thanks for bringing this to our attention. 

Would you mind giving us some more info on the notification, or send us a screenshot of it, so we can check it out?

Does it refer to not having enough Dropbox space or space on your hard drive?

Let us know and we'll go from there.