Probably from the day Thunderbird automatically upgraded to 128 version, I am having problem reading some of my mails. I click on them and I get a white window, no content at all. I tried to go back to version 115, but I haven't found the link to download version 115 from the official site https://www.thunderbird.net/ . Can you please help to go roll back to previous version? Thank you, Evangelia Daskalaki