Whenever I open Thunderbird, I receive an error message for each of my 17 email addresses. I do get access to all of them, but the error messages are extremely annoying. The trouble is the text of the messages is off-screen. Even when I use "ctrl + -" to reduce the images so they are not off-screen and readable, they are still off-screen. I do not know what they say. There is also an email request to connect Thunderbird to Office 360... WHICH I DO NOT WANT. I hate MS. Is this connection to MS necessary? I really want to go back to the previous version of Thunderbird. How do I do that?