Mcafee VirusScan

When I Click On The Update Button On The Interface. It Said It Update Has Finished,But After I Restarts,The DAT File Is Still The OLD One. This Start Happening After I Used The 5.12 Version Upgrade.
I Also Known That The DAT EXE File Will Work… But I Don’t Want To Go And Download Evertime…
Can Anybody Help Me With This?????