More information needed. The location you reference is where they would have been stored prior to the restore. Tell us what you have from the backup and we can assist. Posting a screenshot if what is in the backup folder will be helpful.

I tried it once. I 1. Created a new Thunderbird app on my new windows 11 Dell computer. Restored the entire c:\user\mylogin\appdata\Roaming\Thunderbird\*. Started Thunderbird on new machine (careful to not be online when I did this as I didn't want to cloud the issue with current incoming emails). 2. Started Thunderbird on new Dell and there were no Local folders there. I have YEARS of data stored under Local and really need them as they support IRS information as well.

Please give careful details. I suggest you post screenshot of your old profile. The profiles.ini text file in the old appdata\roaming\thunderbird folder will name the profile in the appdata\roaming\thunderbird\profiles folder. From there, click to the mail\Local Folders folder and do screenshot of that.

On the recovery steps, do in this order:

1. if there is an appdata\roaming\thunderbird folder on the drive, delete it
2. install thunderbird, start once and exit. This establishes a base pointer
3. now, delete the roaming\thunderbird folder
4. then, paste your old thunderbird folder there
5. now, restart thunderbird and data should be there. If not, seeing the requested screenshot is important to give further advice. thank you