ImportExport NG - Vintage - where to download

Thunderbird Add-ons
#1

Did install Thunderbird 45.8.0 (yes, it’s vintage) on my Mac today. Found the download page for the plugin “IImportExport NG”. But only for newer versions of Thunderbird.
Where to go to find the vintage plugin I need?

Best Regards
Stefan

P.S. sorry for posting in “DeepSpeech” but choosing a category did not work on my smartphone

#2

ImportExportTools NG Version History

#3

Thx. Found that Page to, but the oldest software on that page is “Works with Thunderbird 60.0 - 73.0”
But I am using 45.8.0

#4

Update to version 60?

#5

Mac
Operating Systems

Mac OS X 10.9
Mac OS X 10.10
Mac OS X 10.11
Mac OS X 10.12
Mac OS X 10.13
Mac OS X 10.14

I am using Mac OS X 10.8

#6