I changed my gmail password (in gmail) and went to update TB. I went to Tools -> Options -> Advanced -> Passwords -> show passwords.
I saw what appeared to be a Oauth2 token in the password slot in the line for imap.gmail.com. I replaced it by my new password and of course got an authentication failure. I then deleted the saved line and restarted TB.
It prompted me for my password (which works elsewhere) but it failed to make the connection.
Any suggestions?
Settings for IMAP Mail server:
imap.gmail.com
port 993
<my gmail address>
Security: SSL/TLS
Authentication: OAuth2