First of all, lol, I would never moderate someone for contradicting me, I'm not that drowned with power.
I use Klamav (stopped now), some of the features of the program (missing modules etc) aren't found, (I can't do auto-scan), whilst the difference between the two versions you mentioned won't be like MS-DOS and Vista, its irritating having an oversized system notification whenever I try to do something, warning people I'm not using the latest version. Besides, the latest version of a program always contains bug fixes that are just invaluable (I long for stability

).