The fix seems to work, also under non-default circumstances: when KiCad is installed into other than default directory, and when the environment variable was set when KiCad was run for the first time but unset before running again.
The fix seems to work, also under non-default circumstances: when KiCad is installed into other than default directory, and when the environment variable was set when KiCad was run for the first time but unset before running again.