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Version 5 from Paolo "Kaosmos" is compatible with TB10 Rated 4 out of 5 stars
I have installed version 5 from https://nic-nac-project.org/~kaosmos/index-en.html#eac.
I works fine with Thunderbird v10.
However, when my contacts already exist in another address book, EMail Address Crawler does not duplicate them in the targeted address book :(