Thunderbird, best e-mail encryption software in the world. 😞
@adi I don't know if it is of any help for you, but if you want to migrate your old Enigmail keystore into the new Thundebird GPG setup, Enigmail offers you a migration assistant. I ran into the same error message as you and managed to migrate my data using the assistant. It takes a while to complete, but it works.
The error message is a shame, nevertheless.
@adi Not anymore. The integrated PGP support sadly doesn't support many advanced key uses (like removing the key signing subkey)
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