lo, it's my office machine and I hadn't bothered with the drivers.
My PC lags to the max with the tool on, it loads one core on the 2.5GHz C2D and there is definitively some transparency issue.
EDIT:
Tried it at home, setup from my profile, W7 RC1 64 bit, 9.4 catalyst driver (I'm using this one as GTAIV ran best with it; I'll wait for 9.7 to become official). Still no go. The window opens up but without any data, I don't suffer any performance issues, though.