For some reason I have lost the display that lists the scores in the bottom right corner. I think maybe I have turned it off accidentally!

I have not turned of the whole interface (Ctrl I) and I have not minimized the score list by selecting my own name.

In fact it does not even display my own score!

Can anyone help... I think i may need to re install it!

There is a button right above the mini map that has a checkmark on it, it should say toggle score visibility, try it.