Hi, my UK Turks is working in openelec.
Try going to system, Add-ons and install from repository. Now scroll down to Metalkettle repo, don't go in. On the right check and see which version you have it should be 1.7.1.
If this is right try going in and uninstall the UK Turks and then go out and using one of the programs like Areswizard or Xunity clear cache then reboot and go and install it again.
If you are unsure in how to uninstall, just hover over the add-on and press menu and here you are given the option.
Another one is to go to file manager and scroll down to metalkettle and press menu and then Edit source, and check you have this in the top one.
http://kodi.metalkettle.co
If it not there you can just add this by going to add source and put this in the top and click OK, then in the bottom a name. Click done and then go back and see if it updates.
Best of luck.