Buy now notification

Eric, Have look @ this AVG article (http://avgclick.me/removeAVGtrialpopup).
AVG Guru

hello everybody,
For an unknown reason I ended up with the trial version off the full AVG anti virus. After the end of the trial period I ended up with nothing, and was urged to buy the full version. Eventually I managed to reactivate my free version but I can't reach the interface when I open AVG because it's overshadowed by a notification telling me that the trial has expired and proposing me to buy now.
Can one of you tell me how to get rid of that notification.
I'm sorry to come with such a elementary question but i'm not very good in computer science and I thank you guys very much indeed for your help. Have a good evening!

Eric, Have look @ this AVG article (http://avgclick.me/removeAVGtrialpopup).
AVG Guru