Ah ... you had a much earlier version!!! Go to your add/remove control panel & see if LW is listed. If yes, remove. Versions earlier than 4.4 used the add/remove control panel to remove or else, there was an uninstaller within the program folder (which would also appear in the Start menu > Programs > LW > Uninstaller. This depended upon whether you originally used the english or international installer. They were different type of installers.) The installer LW uses now is totally different to previously & doesn't use the Add/remove control panel at all! It will uninstall previous versions later than 4.4 at the beginning of installation process.

After doing this, still run CCleaner to make sure.