To the OP, you have your answer. You could still use the free version of Avast 4.8 with database updates. If you are going to use an illegal one, then it doesn't matter if you use the free version in a commercial environment. If it is not a commercial internment, then better yet.
If you don't want to customize, then don't. Use it "as-is". If you are an advanced user, then you could indeed customize it (if you were not so lazy). If you don't care about new features nor new malware, then maybe you shouldn't use an AV at all.
So, stop being a troll and use whatever you want, or nothing at all. We don't care. In any case, you got the best answer you will get here, and it is clear already that your not so welcome to keep asking.