The suggestion to hackedit max version number here works for me:
http://sourceforge.net/forum/forum.php?thread_id=1758037&forum_id=658717
for Thunderbird 2.0.0.9
I put the hacked habu .xpi here:
http://www.dspsrv.com/~jamesc/torture/home/grease/
If you use it your computer might explode of course.
I also had to right-click on toolbar and Customise and add Habu Reporting icon
(moving to new computer).
Habu:
https://addons.mozilla.org/en-US/thunderbird/addon/2672
http://www.cybertopcops.com/tips_tricks-spam-reporting-tips.php
http://sourceforge.net/forum/message.php?msg_id=4367034
1) Download habu-1.8.6.2-tb.xpi
2) Change .xpi to .zip
3) Extract install.rdf from .zip and open e.g. in Wordpad
4) Change line 14 from