If you try to go to the KEYS section of the game's CONFIG screen and the game crashes, it could be due to issues with USB controllers. There is no fix for this in our legacy Universal Combat games.
If you are trying to change your flight controller in the KEYS section, you have to do it manually using the following steps.
Start Notepad (or any text editor) and open the UCCONFIG.INI file located in the game install folder
Scroll down to around line 117 and look for the entry that looks like Controller=2
You can change the value on that line to reflect the flight controller that you want to use. Valid values are 0 for keyboard, 1 for joystick or 2 for mouse (default setting). So to change your flight controller from mouse to joystick, you would change that line to read: Controller=1
Save the file and exit the text editor
Run the game as normal. If you have problems, just quit the game and delete the UCCONFIG.INI file. Next time you start the game, a new one with default values will be created.