Mozilla Thunderbird doesn´t open anymore in Windows 8.1. When I started Thunderbird the error message appeared: "This account...is being processed. Please wait...". I clicked Ok and another message appeared I clicked Ok and the thunderbird icon has dissapeared from the taskbar. Now if I click to the direct access icon at the desktop to start thunderbird the error appears saying that It was changed or removed the element thunderbird.exe, so the direct access will not work correctly. I looked for Thunderbird in the Programs installed in my PC. I found 2 versions of the program there: Mozilla Thunderbird 38.5.0 (x86-es-ES) and 38.5.1 (x86-es-ES). I searched for the file named thunderbird.exe in my pc and I couldnt find It. The only similar file I found It is called thunderbird.exe.moz-backup Then I tried to change the route of access in the direct access desktop icon from "C:\Program Files (x86)\Mozilla Thunderbird\thunderbird.exe" to "C:\Program Files (x86)\Mozilla Thunderbird\thunderbird.exe.moz-backup" and It doesnt work anyway. Please, help to resolve this issue without loosing the data (email accounts and emails). Thank you in advance.