On Saturday, February 21, 2015, I opened Thunderbird to get my email as I have done for several years now. But this time my account wasn't available. Instead I could create a new account on Gandi.net. I dismissed the offer, but to open my account with my current email provider, I had to enter my name, email address, and password. When my account was opened, ALL of my Local Folders were gone. These folders contained important transactions, many still in progress. How do I recover them?