I'd like to open regular text file (text/plain; charset=us-ascii) via ENTER or RT (nothing happens)

[gadefox]

.. edit (e key) works fine and opens nvim. Any idea??? Tx

[gadefox]

Please note:
xdg-mime query filetype ./xx returns text/plain
xdg-mime query default text/plain returns nvim.desktop

and
xdg-open ./xx opens the text file in nvim

[lukasvrenner]

If you use the -E tag, the enter key will open text files in $EDITOR. You can store that by putting NNN_OPTS="E" in your .bash_profile or creating an alias in your .bashrc:
alias nnn='nnn -E'