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由 Sidsalinger 发表于 Jan. 8, 2018 · 永久链接

I installed a second copy of Thunderbird (v45.0) after downloading it from: http://ftp.mozilla.org/pub/thunderbird/releases/

Doing so does NOT remove your current version. By using the older version, I was able to install Quicktext which then works with both versions (I'm also using v52.5).