Workaround for Star Citizen version 2.6.3c One drawback is that this will lockout the modified action from being bound to the mouse at all. It is really only appropriate if you need to bind another action to an existing 'locked' mouse default. Example: I bind Launch Countermeasure ("Chaff") to Backslash, but Mouse4 always launches CM! Even if something else is set to Mouse4! Paste a "blank" mouse mapping under the name of the desired binding in your exported control profile, then re-import. i.e.: <actionmap name="spaceship_defensive"> <action name="v_weapon_launch_countermeasure"> <rebind defaultInput="g" input="kb1_backslash"/> <rebind input="mo1_ "/> https://i.imgur.com/bqN0ygl.jpg Mappings are saved to Program Files\Cloud Imperium Games\StarCitizen\Public\USER\Controls\Mappings\ (StarCitizen\Test\... for the PTU) See this awesome forum post for a guide to XML as pertains to Star Citizen https://forums.robertsspaceindustries.com/discussion/comment/3747594/