Cannot Close or switch to other tabs Puntuado con 2 de 5 estrellas

I love this extension, it has made my life lot easier. But today I noticed that i could close one tab and then it wouldn't work nor can I switch to a different tab. I reset the extensions preferences thinking that would work but to no avail. I see on your website there is a new version, I downloaded it but have to idea how to install it. A quick fix would really help now,

Esta valoración es de una versión anterior del complemento (0.4.0.4.1-signed).