I have out of town for the last week, and accessed my email on my iPhone, all emails would stay on the imap server until I updated the email inbox on my home computer. Friday (April 13) I accessed my email, on my home computer and everything seemed fine. During my absence there was also a windows 10 update. After I completed viewing my email I rebooted my computer and when I attempted to launch Thunderbird, a new version had just installed (52.7.0). I had to enter all my server details (inbox / outbox), all of the emails that were filed in folders (except inbox) appear to be correct, but my inbox did not contain anything prior to the time of this update. How can I get these emails back?