Improved user interface. Organized dialog items with tabs.
3D Instrument panel and 3D Head-Up display. (You can also select old-style HUD in config dialog in case your monitor does not have enough resolution to show 3D HUD)
Changed default key assignment. W key for flaps one step up, and S key for flaps one step down. (If you install YSFLIGHT over the old version, the new version inherits the old-version key assignments. Unless you change or reset key assignment from the menu, key assignments doesn't change from the previous installation.)