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work around to get lightning into the latest release

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I just updated to the newest version and there is no Lightning app, not even one in the add-on tab.

Do I have to revert to an earlier version to get Lightning back? What version?

Win 10

I just updated to the newest version and there is no Lightning app, not even one in the add-on tab. Do I have to revert to an earlier version to get Lightning back? What version? Win 10

Chosen solution

Thanks for your answer. I originally saw that page and thought it didn't apply to my circumstance but now I wonder.

In any case it's fixed. I deleted Thunderbird->Reverted to the last build that was compatible with Lightning->Installed Lightning again->Deleted and reinstalled then newest Thunderbird.

And there it was, my calendar, sitting there as if it had never gone.

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Chosen Solution

Thanks for your answer. I originally saw that page and thought it didn't apply to my circumstance but now I wonder.

In any case it's fixed. I deleted Thunderbird->Reverted to the last build that was compatible with Lightning->Installed Lightning again->Deleted and reinstalled then newest Thunderbird.

And there it was, my calendar, sitting there as if it had never gone.