Hello community, it's about installing the Enigmail add-on in Thunderbird. Although I restarted my computer, in the right corner of the Enigmail-Heading stands written: "Requires restart". And when I click the button "+ Add to Thunderbird" there will be a pop-up that says: "The add-on could not be installed because it does not match the add-on Thunderbird expected." Any idea how I can solve this problem? Thanks in advance!