After installing Thundebridge Add-on in order to make it work with my VPN, Thundebridge has frozen. It doesn't work. I can see all my contacts but it is all blank concerning the mail folders in the main page. Impossible to enter in the add-on configuration to uninstall it. I uninstalled Thunderbird but again -when I re-install it- it won't work. My version is 52.1.1 How do I remove completely this add-on and make my thinderbird work again? Please answer soon !