After some more investigation it seems to be something I added years ago but not sure why.
Goto System, double click on the system page and that button has "Tools", if you double click on it under the label tab it has "Tools" but it is greyed out
I tried deleting the button but then the second button along maps to it, the only way I can have it work with the correct function is to have the "Tools" button in that spot on the system page.
It appears on all device pages excluding the home page.
I have a suspicion it was to access the system settings on the remote itself by holding it down for 10 seconds or so, after all the mucking around that doesn't seem to work anymore though. I had to copy the button from another file to put it back so my maped button works the way it should.