Rated 5 out of 5 stars

Works again thanks to Torstein's advice.
Go to : "Tools > Options > Preferences > Security > Web Content".
Check Option "Accept cookies from sites"

This review is for a previous version of the add-on (3.5). 

Rated 3 out of 5 stars

Great application but has now stopped working with the message "Your browser's cookie functionality is turned off. Please turn it on,". Could not find a way to turn these cookies on.

This review is for a previous version of the add-on (3.5).