I was extremely disappointed that the Trialware download version is 1.0.4000.2295 - not even the latest publicly-available build.
The clock is ticking, and what I have is completely useless for evaluating on Windows 7 RTM.
If there is a way to upgrade a trialware version prior to expiration, Symantec makes it extremely difficult to find out what it is.
Now that I'm working for myself, I can be only worth a few hundred bucks a year to Synamtec, and they make you feel that way.
Apparently there is no interest in helping you at all unless you are already paying a fat annual maintenance fee; and even then, judging by the resposes I've seen in these forums, very little.