About AVG Internet Security Registration - 755

I am having trouble registering I have paid for the renewal until October 2017, and I did not find a way to put the key to register with paid the same.

Other user Ernani Kopper posting (https://support.avg.com/answers?id=906b0000000Dbs3AAC).
AVG Guru

Ernani,
We apologize for the difficulties. Make sure that you have not installed AVG Zen interface. Refer this article: http://avgclick.me/ActivateNewLN to reactivate your AVG Internet Security. If the issue persists, kindly reinstall http://avgclick.me/howtoreinstallAVG your AVG program. Please, feel free to let us know if you require any further assistance. Thank you.