Razorblatter wrote:calib.txt is not a standard file on the TT. It can be used to correct a calibration issue but the touchscreen should work without it.
It looks like you got a bigger problem and may have to replace your TT. But, hey, they are cheap second hand nowadays.
Problem solved again via youTube. [Please Register or Login to download file]
Cal. txt with these values 954 79 870 127 and the shave works again.