Thunderbird asked me three times if I would let it make changes on my hard drive, and foolishly I said no, because i was very busy. Now Thunderbird will not allow me to send any emails, and getting them is slow. How can I get tell it now to make changes? I've looked at my downloads, and found lots of Thunderbird things, and have allowed lots of things to change my hard drive, but cannot find the right one. I have re-booted Thunderbird, and one email got through, then all others failed. I would really appreciate some help please. Thanks, Barbara