SOLVED Moving Tb profile to new computer

[DanRaisch]

You're welcome.
Can't answer regarding those URLs but your best bet to reduce chances of Thunderbird getting messed up would be to completely block Ccleaner from touching the Thunderbird profile. Too many folks have reported problems due to that clean up utility wiping out something that Thunderbird (or Firefox for that matter) needed to run properly.

[Wiggam72]

Thanks. For a long time I've had Firefox blocked/unchecked in CCleaner, but never thought about doing the same with Thunderbird. So, from now on, I'll leave it unchecked.