AVG Doesn't open

Hi Dimitris,

We apologize for the inconvenience caused, please attach us the screenshot of the Message that you're getting to assist you further.

Thank you!

I use a Macbook Air and I just downloaded AVG again since I had to reset my macbook, when I try to open AVG, it just says 'The application "AVG AntiVirus" is not open anymore.' What can I do to fix this?
Hi Dimitris,

We apologize for the inconvenience caused, please attach us the screenshot of the Message that you're getting to assist you further.

Thank you!
Dimitris, To take a screenshot in MAC, please follow the below instructions : 1. To capture the entire screen, press Command-Shift-3. The screen shot will be automatically saved as a PNG file on your desktop with the filename starting with “Picture” followed by a number, example Picture 1, Picture 2, and so on. 
2. To copy the entire screen, press Command-Control-Shift-3. The screen shot will be placed on your clipboard for you to paste into another program like PowerPoint, Word, Photoshop, etc.
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