Today's update adds a new input system option in the game. The 'Advanced Settings' dialog allows you to toggle between DirectInput and raw input. This will only affect PCs running Windows. Previously, SimplePlanes was using DirectInput. This has the advantage of joysticks using calibration settings configured in Windows. There are still some users experiencing trouble with certain joysticks though, and we expect raw input to have some better support for these. Changing the input system type will reset key-bindings though, so current users will default to staying on DirectInput and new users will default to raw input. This can be toggled at any time by going to the controls configuration page and clicking the 'Advanced' button to get the advanced settings dialog. From there, just click the checkbox next to 'Use DirectInput' to toggle between DirectInput and raw input. When changing your input type, key-bindings may be lost and the game will need to be restarted for the changes to take effect.
For anyone still experiencing trouble with joysticks, we recommend switching to raw input.