Since the last update to Mozilla Thunderbird I can no longer trigger documents to be sent by email by working from the document. I can only manually drag and drop documents into an email I have already created with Thunderbird. For example, I can no longer right click on items on my computer (folders, text documents, PDFs, etc), then select "send to" and then click "mail recipient" and have Thunderbird open up and show an email template containing the selected attachment. On adobe PDF documents where there is a little envelope on the tool bar that previously triggered the document to be added to a newly generated Thunderbird email as an attachment, now nothing happens when I click on the icon. On documents that have a drop down menu under "file" in the top tool bar, that includes "send to" then "mail recipient" if I try to use this method Thunderbird doesn't react and create an email. I have been all through Windows settings and Thunderbird is selected as my default email program. I have been all through the Thunderbird settings as well. I am running Windows 8.3 professional 64 bit. Thunderbird was working splendidly before the last update. I just can't figure out where the glitch is.