Thunderbird Calendar won't sync to Google Calendar - fix

I have been using Mozilla's Thunderbird Mail/Calendar program for quite a while now, and faithfully letting it do its updates...normally no problems.

I have the Lightning Add-On for Thunderbird that adds the Calendar sync, but it requires another add-on to access Google Calendars (for read/write). Apparently that add-on Provider for Google Calendar did (or does) not automatically update...you have to manually install the new version.

So if your Thunderbird calendar suddently stops accessing your Google calendar...see if you need to download some new plugins.