__TOC__ =What changes are we making to profiles in Thunderbird 68?= Some users have multiple installations of Thunderbird, each in separate {for mac, linux}application{/for}{for win}program{/for} folders. These separate Thunderbird installations previously shared a single profile by default. Beginning with Thunderbird version 68, Thunderbird will use a dedicated profile for each installation of Thunderbird (including beta and Nightly installations) . This will make Thunderbird more stable when switching between installations on the same computer and will also allow you to run different Thunderbird installations at the same time. *You will not lose any personal data or customizations. Any previous profile data is saved and associated with the first Thunderbird installation that was opened after this change. =Can I change which Thunderbird install uses my previous profile?= Yes. You can use the Profile Manager for each installation, to set a new default profile. Directions are available in the [[Using Multiple Profiles|Using multiple profile acticle]] =What happens to my profile if I downgrade to a previous version of Thunderbird= To downgrade to you will need to install thunderbird and then use the [[Using Multiple Profiles|profile manager]] profile manager to specify your old profile to be used. =I already use separate profiles for my different Thunderbird installations= If you have already manually created separate profiles for different installations, you will not notice the change (this has been the recommended procedure on Nightly for a while).

What changes are we making to profiles in Thunderbird 68?

Some users have multiple installations of Thunderbird, each in separate applicationprogram folders. These separate Thunderbird installations previously shared a single profile by default. Beginning with Thunderbird version 68, Thunderbird will use a dedicated profile for each installation of Thunderbird (including beta and Nightly installations) . This will make Thunderbird more stable when switching between installations on the same computer and will also allow you to run different Thunderbird installations at the same time.

• You will not lose any personal data or customizations. Any previous profile data is saved and associated with the first Thunderbird installation that was opened after this change.

Can I change which Thunderbird install uses my previous profile?

Yes. You can use the Profile Manager for each installation, to set a new default profile. Directions are available in the Using multiple profile acticle

What happens to my profile if I downgrade to a previous version of Thunderbird

To downgrade to you will need to install thunderbird and then use the profile manager profile manager to specify your old profile to be used.

I already use separate profiles for my different Thunderbird installations

If you have already manually created separate profiles for different installations, you will not notice the change (this has been the recommended procedure on Nightly for a while).