As of 2 days ago (and counting) Thunderbird email program showed an issue with my folders logos being "whited out", and no emails will download from server. I can access my account on the server, however nothing has come into my inbox since Sept. 14,2020. I checked and that coincides with an update of Thunderbird. How can I fix this? Can I revert to previous version of Thunderbird and then no longer allow automatic updates. Thanks for any help you may be able to provide this old lady who is not all that smart.