thunderbird rc2 upgrade

I upgraded thunderbird to rc2 last night - It wiped out the couple of extensions that I had installed. One (and the one I use most) was virtual identity that allows me to hack the from address in the email easily. Useful when you reply to emails sent to the catchall address and Mailing list Headers which gives better links for handling the header information. Both the above links allow you to download newer versions which don't get picked up by the "automatic update"