[Bug 1945368] Re: Thunderbird 91 forgets default calendar

[Tero Gusto]

Forgive me if this is not the bug in question here (I didn't read the
whole thread) but I found this issue while searching for a resolution to
a lost calendar, and I thought I would share my solution, in case anyone
else encounters the same problem.

I have an old Thunderbird installation, in which I never used the
Calendar before.

I couldn't find the Calendar anywhere, even though it should be part of
Thunderbird. I finally managed to get Calendar working, but not sure
which of these steps did it, so sharing them all:

WARNING: This will delete everything from your Calendar, so only do this
for a fresh start.

- Removed a couple of old Calendar lines from prefs.js
- Deleted all folders and files inside the /calendar-data folder
- Set Offline to "On" (wasn't set) under Edit-Preferences
- Added Calendar icon at the top (Views-Toolbars-Customize) clicked and added a calendar

Now "Events and Tasks" are shown in the menu at the top (I am pretty
sure it was missing) and I have a working Thunderbird Calendar.

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https://bugs.launchpad.net/bugs/1945368

Title:
  Thunderbird 91 forgets default calendar

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