Whoa, that was the fast answer
Anyway, this time it worked. For future reference, I've changed those lines:
KeyBinding:Ingame_Left_UKB3|LeftArrow|A|None|None|None|None|
Left|10
KeyBinding:Ingame_Right_UKB3|RightArrow|D|None|None|None|None|
Right|10
KeyBinding:Ingame_Down_UKB3|DownArrow|S|None|None|None|None|
Down|10
KeyBinding:Ingame_Up_UKB3|UpArrow|W|None|None|None|None|
Up|10
Replacing the last "set of values", like this:
KeyBinding:Ingame_Left_UKB3|LeftArrow|A|None|None|None|None|
None|10
KeyBinding:Ingame_Right_UKB3|RightArrow|D|None|None|None|None|
None|10
KeyBinding:Ingame_Down_UKB3|DownArrow|S|None|None|None|None|
None|10
KeyBinding:Ingame_Up_UKB3|UpArrow|W|None|None|None|None|
None|10
Now, it's time to play