Have a quick look at your key setup in the Input screen, it'll tell you what keys are assigned to it. I'm running FC and that's got RWin + Home and RWin + End for startup and shutdown respectively, but it could have been different in 1.02. Hope that helps. :)
The slide might not be the best axis for zoom, I use mine as the antenna elevation and you really need to get it roughly where you want it and then be very gentle and adjust it until it doesn't spike.
Kinda sucks cause it's called a "precision slide" and it's anything but precise...