Egil Støren

I tried to follow advise in https://support.mozilla.org/en-US/kb/print-list-messages by installing ImportExportTools-2.8.0.4.xpi from https://freeshell.de//~kaosmos/mboximport-en.html on Thunderbird version 24.3.2. The description on how to install did not work, as the Tools -> Add-ons did not have any option to directly install an xpi file. I found a way to install by sending the xpi file to myself as an attachment, and when opening the attatchment, I got an install option. When I clicked "Install now", nothing happened, and I did not get a new menu item it the tools menu named ImportExportTools. Is this add-on compatible with my version of Thunderbird? How can I alternatively get functionality available in this add-on? Best regards, Egil Støren