First, last year migrate would not work because my pc had profiles in a non standard location. The migrate instructions still do not reflect a way to migrate that case, specifically, its not enough to copy the profiles folder, the <user>/appdata/roaming/thunderbird/*.ini files have to be ported. Namely installs.ini and profiles.ini. The instructions should just start with that thunderbird folder, because starting at the profile folder and going up two folders does not get you there for a non default install. ============================================================================== In any case, once again I am trying to migrate, this time I am migrating a default install, meaning the entire profiles and .ini files are under <user>/appdata/roaming/thunderbird/ Yet I have the same symptom as a year ago, once i copy the old pc roaming/thunderbird over the new pc, then start thunderbird, it acts as if it is a new install and keeps prompting for new account. The old pc is up to date ( 91.3.0 64 bit), as is the new pc. Both pc's win 10 both up to date. Is there a way to force the new install to stop acting like a new install.? ======================================================== ps - I have been thunderbird user almost as long as thunderbird has been around. The migrate I have done over and over, almost always it does not function as advertised. I will donate as much as needed if someone volunteers to integrate the migrate function into thunderbird. Beginning with a user controlled way for thunderbird to STOP thinking its a new install.