Yeah, all I can do is see data, there is no way to clear codes or do anything else. Installing it is the easy part, just install the program and driver and plug in the USB adapter. It didn't connect to the vehicle at first since my 4Runner is a 2004 model that doesn't have CAN but after I chose the correct vehicle it started working.
I seem to have found the problem but I don't know what to do about it. If I install just Techstream by itself, it will only run 30 times, needs a Key and has to be connected online before it will work, so there's no way to use it by itself, but when the Tiskey program that came on the cd is installed to make it possible to use Techstream it also removes most of the features!
It's a no win either way, either the program has useful features but won't run so you can't use it or you install the Tiskey hack to make it work but all the features are removed so it won't do anything useful.