It has been reported that when using the program under Windows 8.1 with high DPI settings, the Maximise, Minimise and Close buttons (normally in the top right hand corner of the screen) are off-screen and can’t be used.
This is a display compatibility issue and can be corrected by right clicking on the railway.exe icon on the desktop or in Windows Explorer, left clicking ‘Properties’ in the submenu, then selecting the Compatibility tab, ticking the ‘Disable display scaling on high DPI settings’ box, then clicking the ‘OK’ button. That should fix the problem.
If anyone has this problem but prefers not to make the change then the maximise, minimise and close functions are still available in a drop down menu by left clicking the program icon in the top left hand corner of the screen.
Thanks are due to Mark Jones for reporting and finding the solution to this issue.