Viber desktop has been great up until the past couple of weeks. Now the ads in the bottom under contacts are video ads and they're making Viber lock up so badly. It jilts the typing 99% of the time too. So nothing is smooth. They're by Adchoices and my computer is clean as a whistle so I know it's not my computer. How do I disable them? I saw another post about adding to the host file but I don't know how to do that.