On 08-01-2016 I bought me a 9 inch Proscan Android 5.1.0 Lollipop tablet and I have a problem. I want to install Aptoide to my new tablet but I can't even though I have my security settings set to allow for other apps to be installed. But when I attempted to install it I can't open the file to install it. Is there anything I missed so I change the security settings to allow me to install Aptoide? I would be happy for the help and thanks you.