This worked for me. A reply from AVS. Had to figure out how to reactivate, but you should be able to do so as well.
George.
To avoid the problem please completely uninstall AVS4YOU software from your PC. Instructions below:
1. Go Start > All Programs > AVS4YOU > Uninstall. Please make sure to click the "Check All" button.
2. Follow this link and download the utility that will automatically remove all AVS software components from your PC. Save the utility on your computer and launch it. It is highly recommended to leave the default option "Delete license key-files" checked.
3. Download the latest versions of the necessary programs from our website:
http://avs4you.com/downloads.aspx
Now install the software on your PC anew.
If it does not solve the issue please contact us again and specify your PC configuration.
Best regards.