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In cases where you cannot start the game at all anymore or you want to reset all settings (including the ones not being reset as part of the in-game restore), you can manually trigger the reset as follows.
Make sure
X RebirthX4 is NOT running.
Open the Windows Explorer and enter "%USERPROFILE%\Documents\Egosoft\
X RebirthX4" (without the quotes).
You should end up in the
X RebirthX4 user folder here. If you are running the game via Steam, you'd see a subfolder consisting of only numbers (which is your SteamID). In this case, switch into this folder (for example this might result in: C:\Users\[WindowsUserName]\Documents\Egosoft\
X RebirthX4\[SteamID]).
Inside the folder you'd find a config.xml file. Make a backup of the file (in case you need to restore it at some later pointer) and then remove the file.
Start
X RebirthX4.
The game will then recreate the config file using the current defaults.
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