AVG free antivirus

AvgAntvirus Free does not work on MacOS Sierra 10.12.4. 
The previous version prior to creating a Zen Network account was working fine.  This problem occurred nearly a month ago, and I was emailed a suggestion by support to uninstall my current version and then install the updated – this still did not work, so I restored from a time backup and got the old version to work until today.  Today, A window pop-up requiring a user account, after which nothing works – not even the prior old version.   It will not start after clicking on the icon.  Thanks for your help.  Seems support is not directly answering this question as there might be a bug.

Abe, If applicable… For your info, just in case that you are unaware, you can post the screenshot here in your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions. 
AVG Guru

Abe, If applicable… For your info, just in case that you are unaware, you can post the screenshot here in your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions. 
AVG Guru