Unfortunately some of the configuration screens either only just fit or are slightly bigger than this screen resolution. In these circumstances the “Return” and “Escape” keys carry out the OK and Cancel button operations respectively. Alternatively if you have your taskbar at the bottom of the screen temporarily resizing it may display enough of the configuration screen to see the OK and Cancel buttons. Using a higher display resolution (e.g. 800×600 or above) will permanently solve this issue. This problem is fixed in TICK v0.55 where the Log, Options and Tools windows are now fully resizable.