Running 115.16.3 because I have a Windows 7 Pro computer. Fine for years! Then a series of power failures and system crashes. Now Thunderbird looks very plain - black and white lines, no 3D blue colors, Delete button is text only, it used to be red. Entire interface looks simple and old. Checked my outgoing and incoming server settings. They match the settings in Edison+ Email that I use on my phone. Phone is getting new messages, Thunderbird on my desktop is not. Outgoing mail asks for a password each time, which it did not before. I know the password, but what a pain. I have hundreds, actually thousands of emails saved in local folders. They are all there, but I am worried if I can migrate them if I move it to a different computer. My inbox has nearly 300 messages now, and growing rapidly. HELP!