I just bought a new computer and things aren't working like they used with a lot of my programs. I'm having trouble with this version of Thunderbird. I don't know what version I have, but I can't get the double space to stop. I unclicked paragraph and it's still double spacing. I need to know ASAP how to fix since I'm doing something tomorrow. The version I'm using is a lot different than what I'm used to. I'm not sure what version the computer tech put in. Can someone help me? How do I know what version I need and what I have. Thank you