i, i have installed your version Safe Exam Browser SEB 1.5 for Windows XP and Windows 7(MD5: 118d7bf39300d2e4023bce855583212a). I have trouble with standard exit keys F3+F11+F6 so i set my own combination F5+F6+F7. I have installed SEB on whole classroom and... the exit doesnt work on any computer, only one possibility is hold down power button for 4sec. -thats is BAD,very BAD!!! Can you please help me? Config is in attachment.