Since January 13, 2025 Thunderbird has not downloaded any emails. I set the TLS setting from 3 to 1 and closed and re-opened Thunderbird, but still no downloads. I am able to send messages. I have turned off anti-virus programs, but still no downloads. When I click on the download button or select the File option to download messages, no information is displayed, and nothing happens. I have check if there are new messages to download from Optus by logging in to Webmail. I have successfully emailed a message from Thunderbird. I have contributed to Thunderbird development because it is the best, and I have used it since its first availability. Now I am without it. Please inform me of how to fix the problem.