I've been using Thunderbird for years and today I start it up and the opening screen, where I would normally see my email folders and emails is blank. The program is telling me I need to create an email account, like this was a new install. Looking at the program files in Windows Explorer, I see my profile and folders with the emails. I don't know why Thunderbird is not seeing anything. When clicking on Address Book it shows the addresses, but pops up a window for "New Account Setup" - My existing accounts and email are not being shown. Any help would be appreciated, thanks. Brian