While I understand what you're going through with the application, I strongly recommend you use the new version because the company at some point will cease support for the version that you want meaning that it won't receive any more updates for virus definitions making it useless against the threats that become more and more aggressive. Even if you manage to install that version, it will be completely useless against new threats. Although we are mostly skeptic to new changes, they're not bad all the time. I personally use the latest version of AVG and it works as intended and you should do the same.