Thunderbird 38.5.1 downloaded, losing Lightning a day after it was installed

I believe I was running 38.5.0 when I installed Lightning today.

From your statements above I can't make any sense of what you did.

Please explain in more detail what you did and what happened.

Yesterday I was running Thunderbird 38.5.0 (I believe). I installed Provider for Google Calendar And Lightning. Today, Thunderbird updated to 38.5.1. After the restart, Lightning was not active, but did show on the Extensions page of the Add-on Manager. I restarted again, and Lightning disappeared from the Extensions page. Provider never changed.

How do I restore Lightning now, and maintain it in the future when Thunderbird updates?

Can you post a screenshot of the Add-ons Manager window with the entry for Lightning visible? http://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem

I downloaded Lightning again yesterday. Thunderbird has been restarted twice since then and yet Lightning remains inactive despite the Add-ons Manager indicating it will be activated on restart

Try this: Determine your profile folder via Troubleshooting Information.

Can you post your Troubleshooting Information? At the top right of the Thunderbird window, click the menu button , then select Help > Troubleshooting Information > Profile Folder > Open Folder

This will open the profile in Windows Explorer.

Close Thunderbird.

Temporarily stop your anti-virus real-time scanner.

Navigate to the extensions subfolder, and locate a folder {e2fda1a4-762b-4020-b5ad-a41df1933103}. It is the Lightning extension. Delete that folder.

If there is a 'staged' folder delete it as well.

Start Thunderbird, and install Lightning again. https://addons.mozilla.org/en-US/thunderbird/addon/lightning/

If it did work this time, turn anti-virus back on.

Thank you. This seemed to work. Lightning activated when Thunderbird restarted. Will this mean that it is likely that Lightning will remain after the next Thunderbird update?

msetter said

Thank you. This seemed to work. Lightning activated when Thunderbird restarted. Will this mean that it is likely that Lightning will remain after the next Thunderbird update?

Not necessarily. But a solution is being worked on.

Thank you Wayne. In my excitement of fixing Lightning, I forgot to post the troubleshooting information. I hope this helps in the long term fix.

Oops. I copied the Troubleshooting to a Word document and just realized that only images can be uploaded. Is there any way that I can get that information out? at 15 pages, it is a little unwieldy to upload as images.