In fact, now the copy of Thunderbird on the laptop has developed a fault where it won't retrieve mail, saying that it can't connect to either imap.aol.com or pop.gmail.com because the SSL protocol has been disabled. I haven't a clue what it's on about, I transferred the roaming app data from here across there to sort it out and have belatedly realised that this will also leave the laptop not having the correct email account password - unless for some reason it does, I have no idea why it suddenly can't be found on this PC.

Anyway if it can't connect to imap then it can't pick up the relevant account. I'm more concerned with why it's doing that really, but not greatly so on the laptop because as soon as I can I intend to reinstall. I might just have to change the password meanwhile!