SOLVED by deleting the Code directory from /home/MyUserDirectory/.config and then re-starting VScode from the menu.
To be clear:
$ code
::Pop up with Unable to write program user data::
$ cd /home/YourUserDirectory/.config
$ sudo rm -rf Code
[enter your password as needed]
$
[no news is good news...so you should only get a prompt back - meaning, the directory and all its contents got deleted]
$ code
[or launch from the menu]
took an extra moment... and then VSCode came right up!
參考:
https://github.com/Microsoft/vscode/issues/68744