The Read Me provides this summary of changes since version 1.0:
Version 1.1
Under the File menu, there is a new item called 'Open Extra Mission' which allows you to play the extra missions we will be releasing from time to time. The first new mission (called "Kursk•Convoy Attack") is included with this update.
Under the Display menu, there is a new option called 'Skip Every Other Line.' When this option is checked, the simulator will only display every other line on the screen. Turn this option on to increase the frame rate (speed up) in the simulator. This option has no effect on the mission selection screens.
There have been several bug fixes, including improved joystick support.
Version 1.1.1
Fixed a bug that prevented users of the floppy disk based version from seeing the mission briefing on the aircraft selection screen.
Version 1.1.2
Fixed a bug that caused the 1024x768 option in the Display menu to be dimmed even on monitors set to a 1024x768 or higher resolution.