How to uninstall 4.0 when no uninstall exists

How do you “uninstall” 4? I cannot do it via control panel, nor can I delete individual components. Disk full notice is given. I feel that unless I can completely delete 4, I’ll not get 5 installed. Open for suggestions.

Didn’t think a new post would help.

Use the uninstall utility http://www.avast.com/uninstall-utility

That was simple enough, thanks.