can't place saved calendar data in correct folder after crash
I had saved the data for thunderbird's calendar in the folder configuration the installation created it, but reinstalling thunderbird to a new disk the configuration is completely different. (could not upload screen shots,) The original configuration was saved under user\app data\roaming\... but the new installation created the folders (different configuration) under program files\thunderbird\...
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Windows key +R Type %appdata%\Thunderbird Press enter
That is where the profile will be located after install and first run of Thunderbird. It will never be in program files or program files (X86) as many user account type on windows do not have write access to those folders.
However given that the calendar data is stored in a database, I suggest you actually move the entire profile folder. No just try and get parts of it to work independently See http://thunderbirdtweaks.blogspot.com/2018/02/copy-thunderbirds-profile-to-new.html.