You should have waited untill you got everything downloaded and received your key before you uninstalled as per my previous information.
[url=http://It would probably be best to first re-register and get a new registration key sent to you and download the latest version of avast and save it to your HDD, somewhere you can find it again. Use that when you reinstall. When you have received the new registration key in the email then re-install.]It would probably be best to first re-register and get a new registration key sent to you and download the latest version of avast and save it to your HDD, somewhere you can find it again. Use that when you reinstall. When you have received the new registration key in the email then re-install.[/url]
That way you still have protection whilst downloading the latest version.