If you've installed the LW Pro 4.1.7/8 & you're still getting that message, then you're obviously opening the wrong version! If you're opening the beta pro version, you'll definitely notice the difference immediately. Sounds like the link you're using (perhaps a shortcut) is still for the older version. Delete that link & create a new shortcut for the new version, but make sure you have selected the beta before you do anything. Alternatively trash your older version.