I run Thunderbird on to Notebooks. All I can detect in the settings is perfectly the same, also the saved password. In the older account, Thunderbird starts automatically and my emails are shown. Nevertheless I can not send emails from there because the password for the smtp server is said to be wrong. But my internet provider valued this password and checked what they could! The never installation asks for my password and doesn't accept my entry of the password although it is the same as shown to be saved... Thanks for your help!