After Defensewall 1.7 failed to convince me, I thought I'd revisit Defensewall 2.45 to see what everybody is raving about. The promised 30-day "full-functional trial" seems out of reach, though. Installation stops with: "Your license has expired. Please enter valid registration file." Apparently there is some residue of a previous installation in the registry; I can't find it. Does anyone know what causes this?