Smejki , here is the following obscure bug for you:
I have a left-handed mouse, where the left and right buttons seem to be exchanged on a hardware level. As a result, I have to switch mouse buttons in most games - all games which do not inherit the windows control panel mouse buttons setting.
In KCD, I change my slash/stab attack mappings through the Controls section, but once I switch to a bow, I can't shoot - the mouse button does nothing - unless I am using the default setting - "Left mouse button" for shooting, and "Right mouse button" for cancelling. Can you investigate the reason for this different behavior for bows?