OK - I'm probably crackers but I hate to be beaten. 

After having a bit of a look around I see that these C10 boards have been a lot of trouble in the past. However it also turns out that there have been several revisions of the design. Unfortunately there are also several versions of the user manuals but I've yet to find one with a photo that matches the board you have.

However - I have found a schematic which does seem to match your board layout.

So I'll give it a couple more shots.

So Kolias - put your best concentration hat on please.

First question: See the attached image: Does the marked (in red) area on your board have a jumper marked INPUTS - 1-2 Pull Down 2-3 PullUp.

Second question: If it does - what's it currently set to i.e. is the jumper on 1-2 or 2-3?

When I talk electronics I always have my best concentration hat on, LOL

The pins are set to 1 and 2 (pull-down). In the past I did have these to 2 and 3 and nothing worked

1) reset that jumper onto pins 2-3 pullUp.
2) disconnect your probe red and black wires and disconnect that resistor.
3) disconnect your e-stop wire from pin 10
4) go to ports n pins and disable all your limits
5) test to see you can jog the motors.

ok it will take me 10 minutes

Did items 1-5 above, I can jog all motors now

1) go to ports n pins/inputs and set probe to 15 active low (green tick)
2) go to diagnostics - the digitize LED should be UN-lit.
3) connect a wire to pin15
4) touch the other end to GND on the power connector. The digitize LED should light.

which wire to pin 15?

Correct, doing the above when I connect a wire from pin 15 to GND, the LED is ON

1) remove the wire from pin15
2) connect the wire attached to your touch plate to pin15
3) connect the wire attached to your clip to GND on the power connector.
4) touch the clip to the plate. again the LED should light.

In use, you're going to need to clip the clip to THE TOOL - NOT a BOLT - NOT ANYWHERE BUT THE TOOL. Get a bigger clip if needs be.

Did all above, but LED light on diagnostic screen is always ON. Touching clip to plate does nothing