Isn't it just a flat screwdriver? He has a sub forum in the makers area. Seems to be easy to get a hold of, you might want to get a hold of him
With the tool that comes with it, a large flathead screwdriver and/or an Allen wrench. The Allen wrench will work on opposite side of the slotted screws.
You've had a lot of EK&T questions recently, this subforum might help you better since its run by Mr Evans http://www.bladeforums.com/forums/forumdisplay.php/913-Evans-Knife-and-Tool
Lets not over complicate this for him jeesh, Turn the screw the opposite way the hands on a clock rotate to take the scales off. To put them back on turn them the direction the clock hands move. Good luck.
Wow Thanks guys, that was nice and simple I was just asking because at first the hex didn't work and I didn't know just a flathead would work but I got it so thank you anyways?