I am moving thunderbird account to a new computer. After downloading and getting to login screen, I click 'done'. The programme only starts to re-assess/re-test the config. This happens whether manual or automatic configuration is chosen. When I click 'done', it only goes to find the config again. It does not begin importing the profile/account/emails. I waited a few times ... so it could download the emails/profile/account - nothing happens. No 'progress bar' appears. How do I get the programme to begin loading on this computer? Thank you in advance