When I started my PC a new Thunderbird occurred and I had to create profiles again. All data missed. How can I find AND RETORE THEM?I install
i CAN'T FIND OLD MAIL, OLD ADDRESSBOOK, OLD FOLDERS WITH CONTENT, ETC. hOW COULD THIS HAPPEN? wHY IS oLD PRPOFILES ETC. LOST, I.E. NOT TAKEN INTO CONSIDERATION WHEN a new version is installed? .