On thunderbird email, My email address disapieared from the left side tool bar. I had three email address and under each where buttons for trash,arcive.

"'''Folder pane not visible?'''" On menu bar (If your menu bar is not visible press ''''Alt'''' to make it temporarily appear.) ''''View''' - '''Layout''' - (tick) '''Folder Pane'''' If the folder pane IS visible but your accounts are not showing, that is a different problem. TB-38.3 Win10-PC