I've had a lot of issues with this addon. It used to work although it was hit and miss– half the time the download would fail. And every time I click the "convert" button an annoying pop-up window appears which is just blank and I always have to close it... pop-ups are never good. And as of recently I've just been getting the pop-up window and nothing happens. The download doesn't even start. This add-on needs a lot of work...