Hello, I updated my Thunderbird from 142 to 143.0 this morning. Since then, most of my folders have disappeared, including my inbox, sent items, trash, etc. In fact, almost everything except for a handful of seemingly random folders that still exist. When I play around with the folder view (View => Folders), it doesn't really change anything. Possibly interesting: I cannot select ‘All Folders’ in the folder view. I use POP and have combined several accounts into shared folders. These are from GMX and Ionos/1und1. Of course, I immediately tried to reinstall the latest version 142, but this did not work because version 143 had already manipulated my profile. I received an error message saying that the profile was already being used by a newer version (or something similar). I have been using Thunderbird for about 20-25 years, so the folder structure is naturally quite old and complex. I use it for work. My Thunderbird profile is 3.5 GB. Can anyone help me? The best solution would be for my profile to be fully functional in 143. Alternatively, it would also help me if I knew how to make my profile, which has already been manipulated by 143, fit for 142 again. Thanks in advance. PS: I use Windows 11 Home. And of course I have a backup of my profile. However, I am abroad and the backup is at home, and by the time I get back there, it will be 3 weeks old. Translated with DeepL.com (free version)