For two weeks now Thunderbird has been acting screwy. I have posted a request already regarding those issues but haven't received a reply. (multiple postings of emails/deleted messages reappearing in inbox after being 'deleted', disappeared Notifications options in Settings, duplication of sub-folders which reappear when deleted,and so forth). The entire program appears to be corrupted. SO- now I've been attempting to download a fresh version to make make it right again but get an error message I can't open the download replacement/update/ (c first image) (c-images) Please help. I have urgent need to send files. Thank you for your prompt assistance. Rob