Thunderbird v60.2.1 (64bit with LinuX MinT)
The 60.2.1 (64bit on LinuX MinT) up date went smoothly but Lighting is hiding from me. I am sure that I missed something. When i go to add-ons, Lighting Calendar is not there. When I try to down load it I get "This add-on is not compatible with your version of Thunderbird".
Cheers.
الحل المُختار
I found the solution: removing the lightning add-on in Thunderbird, I exited from Thunderbird; installed xul-ext-lightning package with sudo apt install xul-ext-lightning (it pulled more packages in). Then I restarted Thunderbird, & then Bobs your uncle or your sister.
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الحل المُختار
I found the solution: removing the lightning add-on in Thunderbird, I exited from Thunderbird; installed xul-ext-lightning package with sudo apt install xul-ext-lightning (it pulled more packages in). Then I restarted Thunderbird, & then Bobs your uncle or your sister.