Lightning seems to often lag the beta releases of Thunderbird.

As of Thunderbird version 38 Lightning is part of Thunderbird. So for a new version of Thunderbird there is always a corresponding version of Lightning. https://support.mozilla.org/en-US/kb/thunderbird-calendar-integration

You'd need to be more specific about your problem.

How can I move off of the beta release (44.0) to a more mainstream release that works with LIghtning?

Download the release version from https://www.mozilla.org/thunderbird/ and install it.

Thanks, but I am on Firefox 44.0(beta) and there is no corresponding Lightning release available - see https://developer.mozilla.org/en-US/docs/Mozilla/Calendar/Calendar_Versions & https://addons.mozilla.org/en-US/thunderbird/addon/lightning/versions/

My question is how can I go back to Thunderbird 38.5.1?

sroush said

My question is how can I go back to Thunderbird 38.5.1?

That was answered see https://support.mozilla.org/en-US/questions/1105392#answer-832896

BTW I clicked your lightning link and the third listing from the top was the beta for use with Thunderbird 44 beta. But never mind. you have your pathway to 38.

Solved your issue?

Sorry for the slow response,

I was reluctant to "downgrade" since that is seldom tested. Lightning version 4.6b1 was released January 21, so I installed that. Problem solved - until the next Beta version of Firefox.

steve

We downgrade and upgrade as part of beta testing. It's problematic only when leapfrogging multiple versions.

Anyway, you can back up your profile and restore from that back to your current configuration if the "downgrade" doesn't go well.