I had some 70 or so templates between six e-Mail accounts that Thunderbird accesses. Version 38.5 installed, and it appeared that the templates still existed. Except when I try to use them [those I've tried so far, about 50 of them], The template addressee listing falls off, the template subject line falls off, and the template opening paragraph disappears. Meantime, some stray line about "x-mozilla" with the date and time [I think} the new installation was done shows up about three lines below where I would be adding to my messages. No fun having to recreate all my templates.