Hi, I'm trying to setup an existing gmail account using POP, and thunderbird is not letting me do it. When I try to add the account online, it keeps displaying error "thunderbird failed to find the settings for your email account". I followed the steps at https://support.mozilla.org/en-US/questions/1232585 to try to add it offline, but it doesn't work either, the "Set Up an Existing Email Account" dialog box has no Done button, if I click "Advanced config" button, it displays "Incoming server already exists" error. Note "Set Up an Existing Email Account" dialog box default to IMAP every time I try to add the account, so each time I needed to change it to POP. Thanks.