Probably a great tool, but it doesn't work with Sunbird 1.0b1 (windows) Rated 1 out of 5 stars

I can install the add-on and configure it, but it does not copy anything on quit. Neither can I install an 'export' button in the toolbar, there is no such button available when I select 'customize toolbar'.

This review is for a previous version of the add-on (0.3.2). 

sorry

mozilla has changed the structure. so i have to change the overlay.
with the next version it will work.