There are some easy step to turn off Avast popups – One way how to dispose of this spring up is to really update your Avast. Either by tapping on 'Update now', or by going to Avast UI » 'Settings' » 'Update' » 'Program' » 'Update'. – If you would prefer not to for reasons unknown update your Avast and stay with the current variant, you can incapacitate these pop-ups by going to Avast UI » 'Settings' » 'Update' » 'Program' » click on 'Settings' and select 'Manual update'.
