Since Mozilla has no points of contact I'll just throw this out here. In early November I made a payment to Mozilla for Thunderbird. The program updated and all seemed well. What I didn't realize until far too late was that the "delete after xx days button" was pushed and all my emails have been disappearing ever since then. Some were critical. And they are gone forever. Even my archive file is gone. If Thunderbird is going to do a full restore to defaults during any upgrade, that should be announced clearly. My life, and my grand daughter's life have been impacted by this glitch in the Mozilla system and I now regret having paid them a nickel. CAUTION: watch out for the upgrades and check your file immediately afterwards. And if you ever need to contact Mozilla? Forget it. I liked the Netscape connection with Firefox but this situation really cuts deep. Particularly since it was so unnecessary.