Weather addon that works?

[Skywatch]

After last years wunderground api issue I changed to yahoo weather instead as it worked. Now yahoo has changed and no longer works.

I do have wunderground still installed, but where do I put the api key?

I have seen tutorial on the net for windows, but not for xbian.

Anyone know?

(I tried looking at the /home/.kodi/addons/wunderground folder and did find wunderground.py, but nowhere can I see a line that looks remotely like WAIK='')

Anyone have this working and would like to share how to do it?