On Linux Mint (17.3 64 bit) Butcher suffers from a major control issue when switching between gamepad and mouse & keyboard.

I attempted to play Butcher with a Logitech F310 set to XInput.
There was NO fire button recognition.
When switching back to keyboard & mouse input, the m/k inputs were not recognized by the game.
When uninstalling then reinstalling, m/k problem persisted.

I need to know where the path to the control setup for Butcher is located on Linux OSes.
Otherwise, there's no means of fixing this.

This is a Unity game? Check under "$HOME/.config/unity3d" for logs and/or preference files.

Found it. Fixed it. Thanks. You're a silver knight.

SOLVED!