Cannot Close or switch to other tabs Rated 2 out of 5 stars

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,

This review is for a previous version of the add-on (0.4.0.4).