How do I migrate the old Thunderbird profile to the new Thunderbird? '''Background:''' Up until mid-Jan 2024 I was using Thunderbird on Windows 7. In mid-Jan I did a "clean" install of Windows and installed Thunderbird. Due to a corrupted Windows installation, I had to do another "clean" install of Windows 10 Pro. Today I installed Thunderbird version 115.9.0. Everything went well. However, I don't have access to my old - pre-mid Jan profile - which has e-mails and contacts I need to access. '''Here's my setup:''' Thunderbird installed in D:\Thunderbird New Thunderbird profile is in M:\Thunderbird Old Thunderbird profile is in M:\Thunderbird-OLD How do I migrate/import the old messages, address book/contacts, and find out which extension I had installed? Thanks.