Puntuado con 2 de 5 estrellas

I don't see this Autofile button ??

Esta valoración es de una versión anterior del complemento (1.1.7). 

On July 7, 2021 we exchanged e-mails and on July 8 we found the issue: there was an incompatibility with an old Thunderbird extension which was not compatible with Thunderbird new API and prevented the addition of new buttons. Disabling the extension solved the issue.