referenced ${rcvar.old} rather than ${rcvar}.old
@ -37,5 +37,5 @@ rcvar=$(cat "$__object/explorer/rcvar")
# --state absent, so ensure that .new doesn't exist and that conf is renamed to .old
echo rm \"${rcvar}.new\"
echo mv \"${rcvar}\" \"${rcvar.old}\"
echo mv \"${rcvar}\" \"${rcvar}.old\"