I just recently upgraded to the latest Thunderbird version and now the local folders I created that had thousands of old emails that I need for my business are all missing...gone...they folders now show as empty! Gone! When I do a global search the email snippets show up as if they are there, but when I click it on, says folder empty. I am trying to stay calm and not break down, but I need these back and I don't know what to do. Please help me find these and get them back. They were from 2008 to 2018. Thank you. I am on a Windows computer on Windows 11.