I just downloaded the trial version of TweakVista again. It is unfortunate that so much of the application is crippled. My first trial of TweakVista was on my notebook several months ago, and I was disappointed. There are several negative posts on this board. So,it makes a proper evalution impossible.
It's a bit like a car salesman saying I can sit in the showroom vehicle, and even turn on the radio--but if I want to check out more I have to buy it.
I will give it the fully 30-day trial--this is very reasonable--but the inability to test the other features is somewhat unreasonable and will probably influence my buying decision. Pity, because there appear to be some very nice features that are not available elesewhere (I currently use WinOptimizer).