If you have changed your resolution in order to play Hell Let Loose and now you can't click on anything there is a simple solution that may help!

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You can start by launching the game and pressing Alt+Enter to go into Windowed mode where you can then change the settings again.

If this doesn't work, you can reset your entire game settings by following these steps:

1. Click Start, type %localappdata% and Enter
2. Open the HLL folder and go to Saved > Config > WindowsNoEditor
3. Delete the GameUserSettings.ini file
4. Launch the game and retest after saving your settings!