In the file E:\.kobo\koreader\frontend\ui\input.lua, you find
Code:
-- For single-touch events (ABS.code).
local ABS_X = 01
local ABS_Y = 00
change it to
Code:
-- For single-touch events (ABS.code).
local ABS_X = 00
local ABS_Y = 01
You will probably need an editor that writes only line feed at the end of lines, rather than carriage return and line feed; cf.
this.