Thunderbird wont start, says there is an out of date add, on wont go further (mac)

When I go to open Thunderbird, I get a window telling me that there is an incompatible add on, it gives me the choice to ignore or search for an up to date version of the add on. When I click on either of these the window closes for a minute then reopens with the same message in a vicious circle. Thunderbird itself won't open and can only be shut down by force quit.

I have removed all that I can find to do with Thunderbird (previous versions etc) and reinstalled thunderbird from a fresh download to no avil. I'm using OS X Yosemite and Thunderbird 52.7.0