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Cannot change server settings - thunderbird cannot restart

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Hi, Thunderbird 102.2.1 (32-bit), 5 mail accounts. Windows 11. My host provider changed imap server so I need correct the server name (just add "mail.") After changing servers settings Thunderbird demand immediately restart. When I press "restart" - nothing happens. Thunderbird doesn't appear, so I start it again and receive this message, Thunderbird is already running, but is not responding. The old Thunderbird process must be closed to open a new window. I.e. Thunderbird always in the memory. Any ideas - what I can do?

Hi, Thunderbird 102.2.1 (32-bit), 5 mail accounts. Windows 11. My host provider changed imap server so I need correct the server name (just add "mail.") After changing servers settings Thunderbird demand immediately restart. When I press "restart" - nothing happens. Thunderbird doesn't appear, so I start it again and receive this message, '''Thunderbird is already running, but is not responding. The old Thunderbird process must be closed to open a new window'''. I.e. Thunderbird always in the memory. Any ideas - what I can do?

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Open Task Manager, find all thunderbird.exe processes and end them, then launch it afresh only once and wait for it to show up. If it doesn't show up on screen, but it's running as shown in Task Manager, let us know.