@Vero but how do I action folders when using the "Use ← and → for folder navigation" for navigation? I like it a lot better, because it's quicker to use the arrow keys fist layer only for navigation, but now I don't understand how to action a folder / file anymore. It just says that the default was →, but not what the default is when using arrow keys for navigation.
Okay got it: It's in the Universal Actions panel > General. There are 4 options to choose from. I selected ->| / Tab symbol. Shift + Tab is now autocomplete path.