After new installation of Windows 11 and Thunderbird at 15.Jan 2025 I had to restore my local Folders to get accessions to prior e-mails. With the function Import it wasn't be possible to import the real data. With konto-parameter I could set the file to the prior profiles, but I could only set it to one of multiple subfolders, to get access to the e-mail data. My solution (but not really a good solution): to copy all data of the prior profile to the profile of the new installation (without a function of Thunderbird - manually by the simple Explorer). You need all data inclusive all folders and files in the \Mail\Local Folders\ with all .sbg Files (= SubFolders with SubSubfolders), .msf (name of Subfolders with data) and the data files. (in Explorer all System files and System folders must be visible). I had then problems to reorginize the subfolders then in Thunderbird and to delete data ---> with manually reorganizing, renaming and deleting unnessary data by the simple Explorer this was easier and faster. The Import Function should be improved - no reply necessary With the istallation in Nov 2024 (when I had the identical problem) I didn't recognized this problem Thanks