The 3rd pane (R trig all the way) has a screen which lets you enable rumble or the browser memory and soft-reset back to the flashcart's menu, where you then run a game or the Browser ROM.
(...read the docs though, because some carts require you to make a dump of your flashcart to a ROM file, and place it in the root of your card with a specific name, which EXPLoader then uses to be able to soft-reset...if it's not there or not named correctly, then the rumble/RAM screen won't even show up for these carts.)
[EDIT: Beat :/]