I uninstalled SB v3.5.1 through 'Add or Remove Programs' (but didn't delete the SB folder in Program Files), and installed v4.0. After installation, I can't view YouTube videos, so I used System Restore to go back to v3.5.1. However, when I now opened v3.5.1, under 'Protection' it shows 'Database Error: The SpywareBlaster may be corrupted or missing' and no Updates are available for me to dowbload. So I thought may be v3.5.1 is no longer supported and have to install v4.0. Then I tried to uninstall v3.5.1 again through "Add or Remove Programs", but an error message said "C:\Program Files\SB\unins000.dat does not exist. Cannot uninstall" Now there are 2 folders in Program Files, they are SpywareBlaster and SpywareBlaster 2. Did I do something wrong? Please help. Thanks.