Reply To: Don’t forget this gold nugget when upgrading to 2.9 or newer.

When you’ve missed this opportunity to load the settings from an earlier version, you can simply copy the userpref.blend file from one version to another. Look up the filepaths for your OS here: https://docs.blender.org/manual/en/2.83/advanced/blender_directory_layout.html

For instance for Linux:

It’s really handy to know where to find the preferences and startup files.